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 0x54574e0767d1ea29954891f5e95956666991e56e304b406d7c11d393acbba011. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9d7741e-746a-4913-ae4a-b4480d4fa609.json and https://artists.proofprofile.net/proofs/artist/a9d7741e-746a-4913-ae4a-b4480d4fa609.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 0x030efef388737d9e41e4bc3a480ddb5e429353ff800f5fcb20d92c3a047fb8c6. 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/QZRP42338170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeac35428827cd9ba5ad8f3fb11c236320ebf1fa508bcf46a60eb32e0ae9ace9. 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/QZES52377384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280f4cf3791f311097935d0d6137d1f1d92c6ab8321717c79391ff9a589ed832. 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/QZES52377387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e3729457ffa933ae91d187f6761b36bcd9e112c95c34bcb50b1bd6629ad139. 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/QZES52363652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac04c6851af4e042994dee36868a1e8a012580308a99a967016f42907598168. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZES52363591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9634fe0ed99d3b358ac57b4cb6f77342f55ae615ef86d0ed7a7f00aef57c88. 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/USEP42316001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4e41b873308af6d06456255fae5d439d555287f4ffe9162673ee074a869cb. 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/USEP42316002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6658f7f4dc8616ae4625dc84125407097b263aff9eba44ca80d670b676beb2. 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/USEP42316004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14c84df6f11e3e96ddaf6314e1e3728aa05a3f2b7028ba225ad6e9197615e87. 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/USEP42316005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a4020ac42771ecc82eccce1a0ec179071125762e6585ad89e139464b6e4d8. 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/USEP42316006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024625afb6885a45ff01e8b441aefcd81a91c6df3ff5c4bea0b1570d74e8ba05. 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/USEP42316007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9634fe0ed99d3b358ac57b4cb6f77342f55ae615ef86d0ed7a7f00aef57c88. 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/USEP42316001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4e41b873308af6d06456255fae5d439d555287f4ffe9162673ee074a869cb. 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/USEP42316002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6658f7f4dc8616ae4625dc84125407097b263aff9eba44ca80d670b676beb2. 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/USEP42316004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a4020ac42771ecc82eccce1a0ec179071125762e6585ad89e139464b6e4d8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USEP42316006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024625afb6885a45ff01e8b441aefcd81a91c6df3ff5c4bea0b1570d74e8ba05. 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/USEP42316007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd92317ba861f01b5d3b7520047665c4732224d377c09cedebdab4e18c0efe3. 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/USEP42316003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e2a1df5244eaffad02e87c1da89e5643de61a9fa6975fba53c5dbffea4dd6d. 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/QZHN32157394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b441184b8d9b5d95b816be4f3756010f54d9a4bee2d83647cefb8817ed489d0. 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/QZHN32157395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf5815d15f6646fe37115c790ea909de34415fb387c5a9d918961ee3ace5bf. 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/QZHN32157396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a58acd5486bee440f14b646d60deb055b88f9a7e10104d17777f9aa6a80ebb. 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/QZWFF2363686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddb22f092747d9435e4b2418cf33db9b53fad95816ea3ace7ab28e1ab6dbc76. 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/QZWFF2363688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8221f4efda55c54d02e7e660656714d13107bb68579c3af2b36a6712036f58a. 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/QZWFF2363690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db6f0bb674c00fe20d83536bcd16d2ad2450cf4dc8cbdaf0543ce8cc2412ba9. 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/QZWFF2363695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa753d7cddba935318edbd9dcc0980054907f730c78a114ebc98a2c19d68f4ffb. 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/QZWFF2363697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d51cdb6ae31e1da218714cf369cc35ff2dbce24038cda6d3bbf2d050ddc2693. 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/QZK6L2061509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0a65d7088ee2f494eb6edfe906c6535bc5de8f1f23ea9785e2e659408cefe0. 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/QZK6J2224894.