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 0xa4ee1133878e64f726909dfa1cc9ab98a0bec186911085d75da8f85dca84af4a. 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/7e4977d5-30b0-4fc0-ae6f-e5d07c2aed13.json and https://artists.proofprofile.net/proofs/artist/7e4977d5-30b0-4fc0-ae6f-e5d07c2aed13.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 0x231c0b1eb9a756dd2c19003addb932185f131a970c2a4dfc8a4048c04b9e9a12. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:28:19Z), 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/GBBPB0402036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb936b4d1c6866252160271a68cc41454fcd5d37da4ad3c4637b60f28c8085de4. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/GBBPB0402037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b116f0a0d05bd707d5c7e275c719d00a6d06b74fdc4bb214a30cabe72376dba. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBBPB0402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7285918102ea857c91091287537006edc91554ad65314259f1c0cf833b482d. 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/GBBPB0400625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24d7fc97112ba1dd93bdcc393d165e31d5a7f92edea5de3887c7f4f0212ac09. 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/GBBPB0400626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa3b5e6d71ad50c29f3ce6d3bf7424e720663acafadf95af89a2f70ad200e13. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:30:24Z), 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/GBBPB0400628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe769d660171aac945e64c0a66237adacd4a85682d2f9214a9aa810ac75cf5864. 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/GBBPB0400629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3b94090e4a6cdfbf71649e9e59793f9030817e21a352e3aa7ffa6579bfe7b3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:08Z), 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/GBBPB0400630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2b397d535138d741ebbef8bc52e83bae6515eb5e8ef590fa666ea817d86908. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:14Z), 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/GBBPB0400631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f305a5124f202c7e1884a675ea28f319b5746b791e9dc44c9e24cf8c2f4ffa. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/US2641737902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5aa17fbe30ceb2b024ea5569643fc137517c027853e1247c998da321b6f095. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/US2641737904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddc429cfac480a50724b01199b4c70fb0ab7eaaf91828a7007686573dd5c9c1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US2641737905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb41b0c4bae6384fb524e4154cb77b9ecd21e2040ead26944b135b6be079289. 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/US2641737906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342dea34bc1c47a63165f307cd97bf27289ef9b87485f11d0e9de621ff56bcc3. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/US2641737907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1c1dfe0ac4a70e4ac8dab5d70f3edf45f4faccd8f1cffc402bc0979a154bb6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:17:56Z), 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/US2642455801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665b6bf64904a42fe029e190dc595a94ef509970a25d556add0c6b564be8b23f. 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/US2642455802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787e4b0f6b7695bfaa6d86d434566e1f2d6bbcbdc9da44614a28a470c31436af. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US2642455804.