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 0x30e2f23aa32903f21b3acd909daebf02f5ccd685408238269877ee6de9d1320a. 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/87028a09-cc66-43db-b71e-105e68067d96.json and https://artists.proofprofile.net/proofs/artist/87028a09-cc66-43db-b71e-105e68067d96.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 0x76c5a8685be5bf6ef4ef260d7a274e6bf9a9719d2046314de8666bf8316d4383. 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/TCAFH2063459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c5a8685be5bf6ef4ef260d7a274e6bf9a9719d2046314de8666bf8316d4383. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCAFH2063459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988a5ca85dc914d2b6c44ecaa6ab3f2c894d5b15f0e1b6d9d3e38253b1cfa3f. 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/GBMA22147293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9988a5ca85dc914d2b6c44ecaa6ab3f2c894d5b15f0e1b6d9d3e38253b1cfa3f. 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/GBMA22147293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c6c1cd989dc81576952d7767ff8723da33fc7040cbc0cb56d4fa10c8c3ee42. 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/TCAFC2014927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23399310fa3f612c66d242fa23f5e8e32e7a8b1dab8da281d7991a6ca2ff486b. 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/QZNWR2157226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23399310fa3f612c66d242fa23f5e8e32e7a8b1dab8da281d7991a6ca2ff486b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWR2157226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d2d6d592d8057965bc1311ced42a4a4d93723d969fa3778ed5ec03005f467b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFE2005137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead58d3054e1374d0d91fe14e4cc4e5b36478bbbd3c5a47def90ccdcf4631cce. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWS2207804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c6c1cd989dc81576952d7767ff8723da33fc7040cbc0cb56d4fa10c8c3ee42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFC2014927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c6c1cd989dc81576952d7767ff8723da33fc7040cbc0cb56d4fa10c8c3ee42. 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/TCAFC2014927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d2d6d592d8057965bc1311ced42a4a4d93723d969fa3778ed5ec03005f467b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAFE2005137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d90ca60b19215782069c9097f1e17d91ede305d32e362a18f4b12e72326892. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAS2253083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d90ca60b19215782069c9097f1e17d91ede305d32e362a18f4b12e72326892. 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/QZTAS2253083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ff155bd8767de7e89add3fb98eec5423eddaed18ca573271e45564d5355a52. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:46:30Z), 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/QZTB62265945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24d8c3ce4bb6156bdca63b7929c0c54fb65662d8850bf8de35813d6917b4366. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6Q2311525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b426e4e8cbde1009f1fecb89936c635fa77111210e5070c6f78623a05b7efe9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEQ2383453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9616886b725976f79661611d2ce102fc5e65dfc968faa892592e5e848ca7f557. 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/QZTAT2371967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c50a6f78260257b64e58148a2c6d2570ecdb035b65733620c8d63c896842679. 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/QZWFN2390684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027661d8396fe76ba50321f0893a8edb021bf0008070b3bf2b661594c191b6e9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN92468361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1388f05b9e9dc92aae45a914643eae2b255c186238778c6d2212f2fa97ef118d. 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/QM7282418526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76490d0918bff4417721bada9b32a8e2e215e227691ae9871f58b9c5d5d4d3d4. 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/QMDA62479501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76490d0918bff4417721bada9b32a8e2e215e227691ae9871f58b9c5d5d4d3d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62479501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d0dd84cedfa4b63f6bcecbb9b9d83513d2d6be0e73355abe8b01662d87ffa0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMF2464794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025da6da8c0fe5e57640de7a7db066716580fa6acffc9c6cdc0dd668ff250c2e. 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/QM4TW2589822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025da6da8c0fe5e57640de7a7db066716580fa6acffc9c6cdc0dd668ff250c2e. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:32Z), 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/QM4TW2589822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2d416b127fd5fad222b7def0e52037bb0074834d70d4934a6282c84b0281a. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM6MZ2530732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4636dfe3d0d631f50892d4f9a64f47ca74f72132b2dea1cc1a78518935ab975b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542161902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69d337d6af4deb6e687049007e2fd6d7f788126e02e2545b73e73faa0a668b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5FN2389403.