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 0x9f17f1b93d51fa2f320a5b38a90e1f3c4d37c32f42ee703651692a3333285c6c. 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/46906d17-1f85-44ce-a3bf-ddc12ad4c1cf.json and https://artists.proofprofile.net/proofs/artist/46906d17-1f85-44ce-a3bf-ddc12ad4c1cf.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 0x2ad0c1faa134068502f47ddecd733522d1a9ec5ebd28db097ed2aed4fb64149a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHNA2300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23c7bb4bd1e1999289825a400148cd31b9491837a1377a1b40d8002253bc069. 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/QZHNA2300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12f8f177555ff6b11d09aff2b92ae65922bee0cc53cc9c26b7d9ca7b28e36af. 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/QZHN92398499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301913d96935ed6fc25b8635be76d4b917247774094eb9dc23d953568632193a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHNA2336441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4892974c248c60d73f0dba0ed8a41c03a82eff7cc51d0b57c710de05d6dbe7a. 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/QZHNA2340128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f7e76b7f648565f6d3d80e18b6f526ed0d4b30b0d6b79b307bbde3cafe3619. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNA2338297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbd0581a3a3925aff3040115256cb187b24e443a3e0bf3072708099948efd4d. 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/QZHNA2336443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304cc8c03d10f643a1054c2faabdb84ab351534d4ce5a6aba5d27e0dabd58270. 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/QZHNA2334358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07c68b5a4c731f1b90c9565bd7d85db08c8713837adff091188b16a041073a1. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZWFR2405357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f2b67afdf62fcb30446130c87c8793f1bc9f60521d113fdbb479bad9fa00e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7M2427682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5aea6edc0e1e16c77fd8bcc64c804b8d64304c952fb36d582788176abb9c1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES62508807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290bec36673496ed6fde1f0cde031dc0cedd47ba6b57f04ef10bfbaa2d15fa3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHN52566844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81042c846419d4d575cce38d768be6a95efbc522968a2c27c70ced934161e550. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHN52566884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c25a92bc6a545cd4497069c0e3bf07052c358a4511368abbf59c334b611c3e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:21Z), 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/QZHN62561066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fe7f65c9d0a82bded19d681181f0e7d777a82080b62b7e01d3d0c446f8a5ba. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN62564457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1118e3314443c6c8ffffbb490129b36bcf40fed3e1f885af0be785d8e0cf91. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHN92510491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c602d4fdd93495a9c0ec1bcfd1a219dacaed52b31983100ea0d9e5ef771f63. 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/QZHN92505960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc43e4d7efaff94b48fee004768b867b39715954d708d8397a731ce029ebe783. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:15Z), 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/QZHN92504294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5f4ab550be5256cd56d71d65c245f7d3adcf5aad16f8a1bdf189241d5d97c0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNC2527246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d420c06f1e48125127f64be6191869dab892db9b51bb5ac6ed6d59442f3ddf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2536260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5041e2bad57e67789418498a935c02d4adfa7dc29542917db627a70bd5270f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:49:45Z), 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/QZK6H2584995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0866e4c4c1d00e0c905134258510bf204c6c9674762dca62069d4927470809bf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:45:52Z), 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/QZK6G2512276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c47df4fb42078c4e1d3808ba491b6c44f4f0a2b17062db5bc9954e76aa599b. 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/QZK6H2587422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96701edf9e13849e298460ac1f50e9cc5210a57b5a9dee391063dee3c3a9d3a6. 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/QZMEM2534388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790356715e895f47e84aae59a559e2eeff67bcc4fb0ff5eb29bf1ba71425b826. 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/QZNWQ2504040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30bc100f9f8e14e85090e454f559e880517a35ca85e8999108f44811666aa0e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZNWQ2505654.