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 0x00d8ad508acbc8c97bffe0c3b75dcdcdd702e038ed93f974b274e90ffdbfc8e8. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a2ad650-e38f-4624-966e-40ec38612b67.json and https://artists.proofprofile.net/proofs/artist/9a2ad650-e38f-4624-966e-40ec38612b67.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 0x02cb780fa53edcc9b314d9109799b2ebb0cbaee1c472ee80abdb12f4b7b5caa1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32244698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d2721e5b09974c85753c61bccc0d826bbc1f898f1fc9e458249dd76f011d3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPJ32268329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8c4d2ddd2fac7faac562a6bb799523b8cdde4b29dd6a9789538d5cd78fc9f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32245439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9a6f732f99c97ced358aea6257d5d630ef70de36eaa27d908e102a2c8b30b9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZPJ32239887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3321cc97c08850e23edf027c69a1f3406c0ca80a3dcfe545044a619ae725c8b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPJ32239877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522d7957084db3b471144c8760455c36e0925014d126f33bcc0d3884501a8f5f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZPJ32334423.
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 0xd9f749143a915d5db3c225c23f826d71a8ebeb600c573094f3554acef5b31e9b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZPJ32239876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149a165d00763111230a72f797da9903d452fa63a7e6eeb3b36589e4898eb861. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZPJ32239842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a759bd4c40fcb12f2027732d7ee5584878d619a5f06eeaba8768a272209033. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZPJ32296692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2516b6a938dca65441963d2aebc3dd1f5fb2c8d7dad09f79702f1d635d4a9ac6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZPJ32245642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086061e124b4ce85540aaa23268616debc41afe2ef98fe4a2ead2a8415828f51. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPJ32239885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c92f2f7644e1b31d11f278af2117e77006f355f46680247669b49f053e01e16. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZPJ32239845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dc30c63296f0c548576e1890261762647c852e6ad19939568afca91d2b0ed9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:09Z), 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/AUGBT2444564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef6564fcf0d44894326fca325908bcf7bdf34ad17214663b2ecf0e3310093b1. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/AUGBT2471252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd6df5ca67cababb1516b28a4781238a088c19ce15f21dbe8814d42482fb093. 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/QZPJ32330562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857e2b729af1faac215488ef2b9a162c259db92b1c90740bfa6443ce1be1b911. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPJ32344099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c74ffe530e30024f50996e877668961fbda2c44bf14b6e614af2d055aebdc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPJ32344875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1bcbd44ead219faaa8b60f9aaeab46a52a2e3b07a65d4ed7393b5714da0860. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPJ32350080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fd700955d879af926dd8fdb0abc48f086e11f7a8e6e789cbdf6ef7dd96aa4f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZPJ32325033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59a02903096bb3ccbd6dcaff636a2c0bcaaede28b9caaff461d3403dbb9aeef. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZPJ32331904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fc56ed31d925c280c68f40a19fbb303c907d7acea13da095fdd0da52b52f6b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZPJ32353931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244f4736c512ac504022b681ff5f21e9aad824439dd5baffce17903aa5a65b57. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZPJ32353878.