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 0xc3f6f31b2b1d71a16624044764084f7c835bdf5223f0f51842ede6ee3b305514. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f028223-e480-46d3-9542-686f8bb9da3a.json and https://artists.proofprofile.net/proofs/artist/2f028223-e480-46d3-9542-686f8bb9da3a.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 0x43f049d8e9bed8c44f066e2bd2e8fb1aee40aa2f0b5172cdfeb81f33a9bcc5e1. 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/SEYOK1768989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67b636e60115f481f8c62d9ce19322da01a60feb68e133e121ff8417107bfcb. 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/SEYOK1768990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e979148578a6a9c42066bb1c0bfb872531c2f174bfaee64aab75ae394720aba. 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/SEYOK1768991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa815b887523b9d99e02932001cb4b3701223a0c3f82e71222164fb66fe2b0f. 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/SEYOK1768992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cee9e5fb1501630ace244725ef330e097fb653e8d77b17aa1bd5e8fbc71607. 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/SEYOK1768993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888d32cbaeef16584020fa57f870abf1942ab1907d20d4c0311f7b6975a87853. 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/SEYOK1768994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dbd2d2698b9b7f3bcdf9157eb5b440e366b37187c5c3f9aa4e9fcaba0e9d10. 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/SEYOK1768997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae062917feb17500df43ff2d66aeeca777c3580042f132231b88951616720e5. 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/SEYOK1768998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7bd37cf3953551c501fc054020d243d3aeb49e25375da53d1715e0f934a300. 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/SEYOK1768999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfdaf7ab1ed2277e031ec366e30879b45a4ad024bd9826e154fafc39a0ccb00. 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/SEYOK1769001.
Laulujen maa - Lauluja Suomesta ja luonnosta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bd40b9985d6fa98789a279d3ba55a29e2eef5f1c986269e4f7f9ee086573fa. 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/FIJC72100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29628a8c7ef57c391823251fe17dc7557eb582f9906cdd0025cee1b686c27fd1. 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/FIJC72100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177cdb1151cafea8559fed6408c32a49f21b06e2fcdded05a4c7fb02ec06d5a6. 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/FIJC72100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65da33ead3df1b2f1c89ed9c17820eafd5c9da88fb677714f422a7a0703602b7. 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/FIJC72100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4804bd9c0cc7f27ade5a72194b755cf7452d9707efb0162f4739559e73c1ab. 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/FIJC72100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d234c2a2890aae5304a2d3ff2051cc62d66b708b25136741433c7f79700b2c. 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/FIJC72100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e837c7b2a1e49d7e2398da593bc37d68dfece3aa4ccedeec3e83df828c88e0. 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/FIJC72100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6df1e4f192f5163a0b93440913b3f933cbd84b9456f65909ae7ac4c7921f4e1. 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/FIJC72100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7ee15b5e8c76bc97be34695e88755fbaaf9307ff2b19767567b6d6c5824f6a. 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/FIJC72100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f302e63b3e5dd592151c74f47d8b7a78de2099bca35e73ef20a174469e0f024. 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/FIJC72100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ed36de10932b962f5720322a8920fb76586f77d7d274f7ce016c83b99eeb2b. 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/FIJC72100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f4daa47b4b5e3b96f53300548e8f084700a929d67cccda5271604530b00b6. 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/FIJC72100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe1e1d5e4f9023ca2ac84d8dd723f3caa44c46bc0b94ad6ef834b2e48fa2b8a. 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/FIJC72100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa39c3ff94839600ce14f6feaf73c7b59d103743382e70208b4901c82b4e4ff. 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/FIJC72100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6d57f8702b1b20fdb465e6630d3596a47209b5dc296b99985c98de11d71d4d. 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/FIJC72100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26ca73526c66b29196ef405278efe0a17fdbe95f7c1d0c9693c249ff14eb1f4. 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/FIJC72100029.