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 0x80fd1dded186845b4122df7d7c21b9f204064868da72d9891150bdf9e41bd364. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/201def33-b689-42c3-9c48-74f342200319.json and https://artists.proofprofile.net/proofs/artist/201def33-b689-42c3-9c48-74f342200319.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 0xe8e5da68621153f1c716f7269e1d1b5ccd68726962692e94908ef5142a8ad178. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR2VZ9900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b31aa433447382dc914e92b6dcdccbf9e34daa03794978f2d3e92251a7ff25. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR2VZ9900249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171233f4a9bbf666f900a8b6eb7237561ae09485176372a89ae1cc37294f3ebd. 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/FR2VZ1200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092edf03c0a48f68cef218db7c7eec79dd0b4240d4ff675c0c857471b88b8eff. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR2VZ1200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d0ce3d3839d1156a278067347b2a2a671698b4bd656e0c3fde13c01fe55a77. 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/DEZ651327917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e5da68621153f1c716f7269e1d1b5ccd68726962692e94908ef5142a8ad178. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2VZ9900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a59792aa51bb2871db18a2ecfa18685d0be467b4ed7e02500700520c6ec11d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2VZ9900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b32ea627d631f841fb14d3863dca6eae04e6bf0c08d92d55777ac0598283cc. 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/FR2VZ9900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2d0982f9732dec0a31f870969a7706de0f00b2612f5bd3b8d46c1a174fcbc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2VZ9900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680ec16205cce9f3a8dfe815380b79152acc442a03139ab48e728452a909c84c. 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/FR2VZ1000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680ec16205cce9f3a8dfe815380b79152acc442a03139ab48e728452a909c84c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2VZ1000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b32ea627d631f841fb14d3863dca6eae04e6bf0c08d92d55777ac0598283cc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2VZ9900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2d0982f9732dec0a31f870969a7706de0f00b2612f5bd3b8d46c1a174fcbc. 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/FR2VZ9900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09de464372db096b83ed6564794b6f1a9a1f28b2fc923df59a7169fadb51642b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR7Z21400069.
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 0xe74cfcb540586cf23b442751162dabbc0bfe17437db87c6eece9c18621c4c32e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR7Z21400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecca9668e4327d202660aef5bf6029753df237916dad2596efb8b8fa0d23ebd6. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/FR2VZ1000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f43de317618668844903cfeb790e3bce728ee511fdf5ade6976f907d096239c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR2VZ9900262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe318ef3e2553f9669392241ecfea5215bdf3a2ae323252f7a6024fade8a4d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FR2VZ9900076.