1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4341af8880ac16f4ea5f282b0c646d5735f7897ad26768b56998e5c93b6f16. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c08601b-89c5-4618-9196-b0d91b249635.json and https://artists.proofprofile.net/proofs/artist/8c08601b-89c5-4618-9196-b0d91b249635.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24903286fe4c716d3458c6a5ff9841ab56e3da8c8a749ec6a3c58629eb1bec2d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669f32aad9b046439c5a74c652dc808650fa7fd4687c259fc7ea4b35624428d0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfeacda6e48381fbbb785ae6e9f9b95813b73bd7c0a315bbeb72cd72ab70082. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a7a8a851fc1192c40942999f010cba10844d2ad6a1208f8f60f04707ce1913. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWP61700172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b33230ee1bda29b5f0b95096e66c853849d84770ee92329d7d4493810617852. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0b44d458248072804039565752ad24c6fbc28f501ef0bbbccba755aff6b709. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238640a8ec5f5dbde69d94b8d20b8f3519a3b6317b7a27068d6e3159cc8c0d55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8524b9c79815e355de1642df2dd30106c95d905b1e2fd89acc9a3f4e6a73b16d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198620a77b9f4a24b382f16f73faf37547ba812eedfd36e51b31e9810010a27. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c81bfb7021e9c0114b4f08385013caa327d0ca21deb8072139db5c5ea9ccf0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b33230ee1bda29b5f0b95096e66c853849d84770ee92329d7d4493810617852. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0b44d458248072804039565752ad24c6fbc28f501ef0bbbccba755aff6b709. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238640a8ec5f5dbde69d94b8d20b8f3519a3b6317b7a27068d6e3159cc8c0d55. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198620a77b9f4a24b382f16f73faf37547ba812eedfd36e51b31e9810010a27. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR1160600351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7237487297ef0335f1311da0029801a2c451f48ca4849416af639b0eeb4e68. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8fa8d837e5915d38e6066d86ced28b26939d79d3aabdb057d0ee1ce676ec5d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:55:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a4496f774c713a4d8c88d910b3a81b62b13ba32adaa544aede08e089c25c98. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f5071cfce939e7b505f6fd102a9280443a950134e465562a965fa5bf3639c2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0ff3ba71d04f89574553ab068f9345529f5b87a072dad6ae4a3a6eb1b17fbe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c88c08c0162f4802d435f1e744270f87422bcc97c85cec766b533685936a72. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b2595af1a49ebd09fd004e738de8a1a065396e6867197a3f79727f5ab7912. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bafb331648778a52ce0d6e7b2cbb0a47d2918a8b6815de771051f3eb673b60. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e125e56d24745e9ff71e2d03ec88467d41417859d25faf669390414e1f8ec6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0320600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37970b3b926edcc3eb19e3551c2a4be2b7c6a95b76c0747e8cc3357ba8350e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0321000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67f94e11e9230feac82077e5b2933d3040a23023b7f628d13fe5c49878a8bfc. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0321000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf244d59a15b0931ea6663320c4939f2afb9261e50e5590b7fa1060145ec643a7. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0321000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc13f55786dd56701af4916467ac41d40474efc63ff42eada8a530d96bf67b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0321000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e2b7988053025fd5121a7088d406fd530655c6a860e80fb9635f67571d0e31. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR0321000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8374bb03437784e22f29a26e3d61313d062214658c2f6e3f877801d29b539f76. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7f095b2702f82678cf7ddf60620af4023953339e994ea93f5f0b8bd26c7322. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8354a453ae7c34ce9ccb8f16595093874ef8794152c4f41f68633ae5ada602. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a999e8e224ce56593678853271685e2d47b23514b9799bfb1cca6155b903e1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa332446152a595fb534ae47d00f44ceebff68f671bbf9238e9c35a4ebb60d9dc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38d658e79cf588944feffd86ffdf58c3041789cebe1051be5c394511f28290d. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa44cf6d2228d76b517290c6fa63f06ddfe2f2ed2288122fd0e186de035b560. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52f011860c61c0c473d524add9223247f6d35e5ec6c15a6ab28c5627f622823. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TR6471300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3df6e52f035809264213e27f27e57f4ca15ef0841524e1ff829ddc4438e674. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX282596700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e6fbbe42aee9454bc81d5523be4ff62a5c7b1cabfcc9de38a44f3c9d9d0d54. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIT2426652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0575e31c26431f6e9c332505f7564dfbaa33ed91c5c30fb000fdeab6c5b42f1c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIQ2460602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2092480512b58e64b5d09bd041e68e6ea6c724358466f8c9ec5adfa74f8a63a8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIS2469925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e6fbbe42aee9454bc81d5523be4ff62a5c7b1cabfcc9de38a44f3c9d9d0d54. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIT2426652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933fd656460f9897f6055e1506338112fa397cb36d04e3e69210a012d2c3e5e3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2446391.