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 0xbf27b593064df0b633b2789dac490c5358d94aafe1fad092b6e5f18a62e30c4b. 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/cd2a00db-f0e6-43ed-9fa6-9cb6cd808601.json and https://artists.proofprofile.net/proofs/artist/cd2a00db-f0e6-43ed-9fa6-9cb6cd808601.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 0xc064da521d055f36af9f2d853b4208773b36742d5afd10ed7a2466b50c3f85ad. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CA5KR2281484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ccb1854f6f6d063587f2d645970cf14b81262c67ce0bbeea7a7ec8cc087e38. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:57:55Z), 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/CA5KR2281486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7501a66e061908a3efbb176f27b13382a337514f87ac9649acfdd5a49c6871f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:07:35Z), 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/CA5KR2281493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac53057623e8fd507d05778b610489e66bbe146756006993ff3256a455db2c0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CA5KR2281495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852d93a5786c370393cca877b2829da432548bfa2157ddbdf78fea0ae7edb225. 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/CA5KR2319940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a476c39853ceb7e5151174d1530bfd4d8716a26473e18d7d8e8f00e009ccc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2319945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a71b7d8eb489785a20dad310a4cbed97a1a220eacf0827f230db80cddfbb4df. 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/TCAHA2321570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c3193cf2e67885b4637ae9567309c14242b005afac644acdf83186d966d3cf. 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/CA5KR2358299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1a0da77e1f352b6eb827882b280c425eb9995d7e8e4580283f3abe2725dbc. 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/CA5KR2358301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e601635366f77b9bf7f6c8dadc277d2c5e8a61a9b28c37cc0345bd13bf38cb4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2358302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c8ea9185f77195bf564755afafc8903b8494a301bdf64200fa28f02a6992cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2358304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb57d3eb5757a3627e898329a9b7f05f66e16e1baa5bb9c37017ba916609cc8. 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/CA5KR2358266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2b0c802ce9af61f31ccb17a546389e128a1e36fa0b9fdbf1a99f5d98133d32. 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/CA5KR2358305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7628cfd55218e548fb742bad43b7bad6dac4e63a3cc3cfe64b2f0436a1a450b7. 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/CA5KR2358306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351033fe18a63ce5d062031edbba07ef2595335b5a95798c833525f490c7abe4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2358309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6b3f53221c14d3f598cdd028ebc450d8b5bb43fb61926ad5e7845ab30e6500. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CA5KR2358300.
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 0x9bec9e2dfc524f9a4edbe1fcddd90d19a6a212709954da1cdd26f1823c02f27c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAHP2343837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622f6469974a340a3a5374d8d34f1392cc40243be983df7a2f4dba7e39507fde. 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/TCAIC2402795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da95b0655ad6de7bca42db83e0cbeaf3c0821a4d9038a1fec16e38e6270818. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAIC2402825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2f4b0e30d278985d330099bdd257a10ce4e528bcfc8f824da2e57d75c0b655. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:37Z), 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/TCAJP2588465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa100a89f4ec7313d122ddd89f841098549c99be0603a85d84a23ec6e9d435db0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAHS2366252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d765c3fab8eacf7b55b77d4681d9af503b85bb7769eb5e4020907ca69029c3c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAIC2481851.