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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceecc74dde3e3fb73482c15c8c047a8783ea9f5dac90bc94e0540a3e82c55344. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04468daf-b0ae-4cbd-87ee-999cdc204cd5.json and https://artists.proofprofile.net/proofs/artist/04468daf-b0ae-4cbd-87ee-999cdc204cd5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffb2e93c4258258165c4ae86afe0b4cb73bf84adb6ba8a659eced0f41fc065e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE66N2386845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bc31f811b07040f7558b9e7bce7c183ecd44c07cc99874e05e9a4754820e59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE66N2347088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef291b6608a22fbe7d85e9a02f28d7c686e24d44c59b428876221aa22284bf2d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6A92371162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccadbab824f93cc83ad65615088b121ebfb80ac9d3ad43ff6a672ffffeb7c764. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/SE6A92332425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc821edb2ddb5436cf4e535e87878c81c90d6a591103ed1e8ac0beba7ee732024. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6A92355067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb0d8cef7abce5d15de55375a81bdb018cdba160de753cb578c6ffb3d95271f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6XW2312935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757703710ad929329763549fa1ddc849ec8333a06ea3cf93f379484dae93fb4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6A92361272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5be12725ade6ccc8503dbb7e46cedfa4436603914f4daadae4b5a8074a56787. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2335454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4f370c08b3c0d84fb6c73cffe823f83479d22e7aaed2d5b8a34e185da25b9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6I32412969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98611af3704fb5aafd7ec88c1cbb08cda1259dbcef398acabc821557de2ff846. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6I32412971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41695efee4e075aa0311904520f3a6e4c3ed19385ef660cb83c3eae8cd2379f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6I32412973.
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 0x6158c7ef366c44a48073998382d8139a7c873af1f5b160e594e00a6e674c9825. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2399473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c96ead8bc120bbabb4308fb815d9112e62bc2af038dd0072b823b232b06cbe7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2399476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a726aa60862e9b44a506e8b8e354001b34b0079643b1e6c8d7991e945790f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2399479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa73cdbdcf0b1ab6123686d890124d75eef5e79b2b9122a91e5721d7fc3ebc6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJX2399480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebbec6b62704a4bf7d0376a2e22e16c9b5ff45b188e78f597f29cbb59228490. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2399483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d88dd72414fd1e99446366fcf222c724645a59fc9184aa423d766a6c6e336f2. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/US7VG2525403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8907b546fe473ef638226cd72227567809d19d09dbbfdc4137c5b9720bc7f9c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US7VG2525402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b0881403eae49f165094d8d60008a12ae007a5dc755f4ba56ad12de7ef6b50. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US7VG2525404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd6c7b215b30fd333365fde1bbb65cd5bcd252bef0b65e38133227830a62d4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US7VG2525405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2700ef1b26f68c54fda41ed072468122e57650da2e35952c54acaef3739f4f3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNJX2452500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4bf7efe1024dbca6be25393e47733517aaa6175daaddb1ab87029abf485172. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGLM2464012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c0fdfefb3e88e0bbbc741ea11b91dd8b60dee34fa2bc83f8822486c4cf3547. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZGLM2464010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e79b7978dd8e66a702c78b4b3419efa248825bc15d36b90bce173f0077bfacd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZGLM2464011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8912e46b5c39c29715ec6fa007df513167daf3d496ce0e46f3be5b8746211667. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2396537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228cbe04b7d2363b1f15722809e36df9f852589d64af4fd899a82979a142c7f0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJV2277415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cdd98710fa4c7963aadafe1fd984ac9d410e286ea9c4b40d087213c08e0a88. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJX2140569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3702fe1820dc5bb31f992dcb618469f33fe134ad207736813d5a5ccd8d2b355. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG2306910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4619148d6a5ff3d3bdf85cd069e3b760d04321c375e598913ec75298a183aaa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2362230.