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 0x3134e616a8f010e781150705a4e3363f90fcd1fceee2f45908c5c107dc2731c9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4d6a845-3cac-44a6-81fc-0704ca4a5cd9.json and https://artists.proofprofile.net/proofs/artist/f4d6a845-3cac-44a6-81fc-0704ca4a5cd9.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 0x7ad3fbb9c6e75a5f512f2fde3704728fb95c87b151b7dc91864fddbfe3411b65. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FI6M72400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c8db972eee01fe1b47c203adf1538f6b449cc7b04ce6785c3e8a0060693743. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI6M72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0abe0dc7e61d3ef192e92457faddf5523fdb5aee9e51da35bc50990201fae8f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FI6M72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc326cd90a938aa0b9d7b2808c310e4577fb71ca6dd3196cbc3cb8e97b743cd. 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/FI6M72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafc7c8291babd5329f11d1c19857f727fb76966c51506560aab62ba26166659. 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/FI6M72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe3b3eaba21c6fcbb424bd8c2054e79fc89495727cad4b157d396ebc7321e6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI6M72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fa771465687409915865dbb5608d39db26af4ea93e142447243f443b3f3644. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI6M72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472e47ceadadb20483a45ae9b0963bc42e6f24d7821a888dc7aa0bc99771f347. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI6M72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68876e42edd1c48995b9210ba4ef0990f4364842475e3203f116e880e91f19d8. 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/FI6M72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c371e6323f305cdc0e7a27b977496a234ec031ff9321976b90701591048bc73. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FI6M72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a1ec996177c941ebad3d013d41082cd9584cc0a25bc26f214f8c184934aa3. 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/FI6M72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bb3f447519ae7fe11fe72ee844d06d4a1ac38b96cb35dedb543f3fb9c562c1. 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/FI6M72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398e7a1bafc092fd58cd9eab502ac75824722e028d6b49e5d13cc9805b58e55e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI6M72500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe849cc8707867e2989f738fffa644c87e700151157dd561663b03cabeb48f3fa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FI6M72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b12b71c222d086ad098157783d2998bdbe2311152fb582041d78ad50ad3845b. 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/FI6M72400007.