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 0xe14bcf1290f1c85ce54dc256be13e5ea0d1e1716a814f66f88959ab8ae2e06f3. 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/9e42d7c2-48aa-4926-a48f-c00743594cb1.json and https://artists.proofprofile.net/proofs/artist/9e42d7c2-48aa-4926-a48f-c00743594cb1.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 0xfd9dac64541599a3ba3db791c614bc7d695e10e87ed0405c6c719cc6f4ad66f6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARQMX1600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cae0e7bd590aa27e4c91792dcdea7823fd545e6f2bd85b668178c6499346b7. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ARQMX1600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c04ee1b5ed28882d872629aa974c1ed8ace257636372f96786db041d2ebbfb3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ARQMX1600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ffbc070aaf1e1ad290d97246454b3a050e916a4152db2489e7d885dd4c17be. 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/ARQMX1600152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3249fcf81be278afad570cc97eafc0fc0c2dbc0d7a573ac0a53aee61431d3b46. 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/ARQMX1600154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbacb499a6525f0d1bb38cb387015b6a8360feee32025b79e7811f417c84f62. 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/ARQMX1600158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ba03736b22abf568638699af30c83ecba3b2ec3cb6c9848427dee6b3bbd7fe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARQMX1600159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190e512b98b2f5d62d071be118d2f8e58bdeb5bc318a0036ae5e67846d9f3b74. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ARQMX1600168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120ac5dba578f04a47e7b0b39591957b28316e0d2ba48081fb1149360ec80392. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARQMX1600169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e2d915fc355771d1f6c6ce9760e5e52e8d4385a16956fa7997179abc31f279. 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/ARQMX1600181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac674486b5ab2e98550beda33536a1407d2edece348e1a66a648140c3b90723. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ARQMX1600183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0a57deb28084225617ae3eaf77105633e70c77391c71cc54b61404ad63b929. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARQMX1600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d956bd1068e8cd640fbfcb29618e817282a273c3bd369080fb18026cdcd5aae. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARQMX1600130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b73eb1528019c98f0e4db8af7a2ba74271a35efa5ec0b617c3455822d62884. 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/ARQMX1600135.