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 0x45ef93f49729f262c4fa120f1e4d1eb97db44c390347837cb7ad1f4610cfc6c0. 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/3c2007b3-67e6-4a16-aa92-75bec50983bf.json and https://artists.proofprofile.net/proofs/artist/3c2007b3-67e6-4a16-aa92-75bec50983bf.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 0x10d38347e86d656ec4ab0e874b9637edea8f2d9052d11f79c0682e9727cb5841. 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/QZK6Q2132607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c6636eb96d43041e4465598f6e7a3342e885dbdec13d7f18707f309fc9dca8. 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/QZNWV2140874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9770e69c620191ea0612226c1741e8ef16d9e9265e1111ea87b4eb1e6db1b15c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDA62206079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080c168b37a063e81d33a2337f07e6df74e8a241317eb8bc5c62f5bbb9c2bf85. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZFP52280968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3030326d6d32917b95c248ead7bf0e4393859ac58f4af7cf2c3c531fcdaf166. 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/QZK6L2225627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e672060522bbb7eaf66efdf6d5b3d74ccc8ae34dc6bf20d6e2d7a56065e97. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN62348552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf43ce92c8c77b372290f805aaffd77e8a01cf7472ad787b0d64ca48f8efabc. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6Q2319851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6770fbc8e912510fad2a580fb7b43069fc8d0681f59524e1b2d1ac6800a5481a. 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/QZFZ62483143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fecdd423edaadf57c74dc015e9b3f306eb3ef595e8db0aba2f38ad1fff1c513. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN42465521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96fd4815dc4490a12904e4ea7d065f3135c099e8f3b01eec0c025677432610. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6N2448412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5ba22da2397cdc95837154f6c44cb64361032487295977d6419af063832785. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTAS2497423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8fc398c6a8aab3a274fafba24513f6083672eb2e2e5f460951e8c913798133. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2495444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad7c65c7704155cbb29cfbc25ab5a0d6c3556c7a57ccf43069147f14d2f9af. 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/QZZ7R2430758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae730353b445d4f2c3699ae2a6a51aa4af7b86e501dedc0d0e8d4caa85a82519. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F32400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c094fb210d62d9258818a75f188e71da86005d00c7abf3fe8a663fa044a3aa. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZFZ72545440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f97c45ecf7c858d8bbb7f32bd7a52d8c6f324ff67d98c92731550e0ab21335f. 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/QZES82569751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1713bc42bec8727c6385647dcf3e7bc7d190a1c1259e4b8243ad898d08a18f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES92591481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc697533386b8336823a40a3aa22adb4b70b867a97f99927ec492d1700eccd569. 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/QZHN82556590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5847555e4062a6c34a57857af33931d860da1d33110b13fbe5e16387443f17fe. 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/QZK6P2527624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f9d1f51ddc759ea86041c69999ff7f78083fc1f94367c23aded5d8ea73e0a. 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/QZMEM2537128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac18a49bdb37a6014b9b04aa3fce9b0b38edd32eed04e4bda8dd444423a993. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZNWQ2521722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0fe03d64f746a485a2a8fdc14284a29fc95838587fe442fb47f624188dbc9a. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZNWX2543337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15596231686fb063f42a77954de158930500531f995b33ff4025f58fee54ca81. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTAX2556573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd438b42e7eebe706d8ca9e9b50c6801d176551ac536304e6ff97d640954cf978. 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/QZTB52538052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8ea6f055c374d26b2d0d77ece90c85764fdef86f4e727dd3f1be0532631ad1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTB82549817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb615983fe7b05be4781d5b9b4935edf4f5fcc86972f590efd40af767e29ebfa. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GBKQU2563921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe51851dd1dbe8cea2d27c5427b9f3e2cc22aa7796ed53ec11370f407c1386f6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFE2576059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa6f8dad8ba8ee55b792f1822fcec8dde616e6aafb3ed2564d3fd5635d7d5c6. 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/QZWFT2525906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42af0b778e3118f1a256cb59ec801ea0f187048965d968f548b32d56911613a2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZZ7L2532346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650c5e02eceff7f4cfb6c003ded782e06177468821f2fe251eb863090e339f38. 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/QT3F22545385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b0bdf2946c53b8c3d809eef7af64d1ccf9d273a18839eeb00d1c59153aa079. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QT3F92559823.