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 0x1c77badebf4f406451477a830c0e395d0cf0f3fd52d21a4ad9f77aa1cfcfe6ca. 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/d376c6b9-0566-48b7-b918-1014db921fa9.json and https://artists.proofprofile.net/proofs/artist/d376c6b9-0566-48b7-b918-1014db921fa9.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 0xfe697318e495517d561c91d05879c8ab1fa5dbf458a7860a0804b9092a2088e6. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/CLJZ21600366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901e662c9af25db25f25bffddee7970151eaf867d42c3b4773ce1b1a01f0b5ea. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CLJZ21600368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2463534b66d34f3e4b8a24eac81effa2e70ec162dd067ef5e8cd449c49fd23. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CLJZ21600371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecd3c3822377e229c1ef2799807339b192d3adecc46e5c4db569c75c4d6a919. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CLJZ21600372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001380cbda5f0618ebc9428173ea3175ce6c2f60ebb638a534da2c815ab63d91. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CLJZ21600373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1d1dd376feba9a327a1f773cfd6f19075644171c18ca9e3904d49080e081e2. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/CLJZ21600375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a49c0e6e9f314f13dbc469cea6703282a961892a96276da28b5c3543915603. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:04:03Z), 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/CLJZ21600376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e2f74edf6e3da583a8b197fc49b53fc229c2c3ddf5474e4133f28d5a72772. 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/CLJZ21600426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f13a167d2cb1e95d8bfbb7409688ea933f570fe60d83ebbec4efe534b0b3c9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CLJZ21600427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b21024ca282be049d5361732f532ab836cc45fd8fc4fef38457ccede48b734. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CLJZ21600428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4381ec02b50c2e5c7ae5e70164528c9bd4506dad156ff44fb6e7f545d9c8b43d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CLJZ21600429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7090679e74a7fa1d23c7d3244bf1020f01c252ff23150a935793fdfc208ddf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CLJZ21600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dec2e8f080102b50db152d5cadaf3cb1677bff37b1c22d473acbf58aa22b19. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CLJZ21600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb008d9fff2df9c1b31898034ab48ec3183d8c97bae7441f47760b56a753cb603. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:19:53Z), 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/CLJZ21600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ccbe0749d8b9455f965bc2c5293be7687a8a763e70c5627f09956e11853936. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CLJZ21600503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee31fe91ce90f98d6db9947775c44159bfa3d961aec9b67d03e641f5648898d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CLJZ21600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476435be815b936cb1fdfd916526d46dfdce14dc16ab6a7eab264356da142e25. 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/CLJZ21600507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0096b65a399f2eadeb78646786eb737fd61f6182a88c5a008a74586985cfa4eb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CLJZ21600508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f75036b37ff0ad4d875f25fd871ea78946db074053345591c6c909e61f8b3ba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CLJZ21600509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5701702f11fcecb7a985588aeb53082628b6afbfd82cf98a3bdd958fb41d75d6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CLJZ21600511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a71abb28555ab5be06db7fc4ec1fe3924d31a462686a12a6cda104549de8b7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CLJZ21600512.