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 0xd6197728c72b8a4f5230c95b65b8131367e405e2817d713b1d64493a455fa65b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ea0a849-aac7-4db6-b768-370e8957693c.json and https://artists.proofprofile.net/proofs/artist/6ea0a849-aac7-4db6-b768-370e8957693c.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 0x84631343613c1f08c01e90040cd6b728b57ed419c763471c3390f8e57755c52b. 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/BRW9I1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78a90a09403ff5d69724e5493feec170776b36b0a3842f3cd2cfc2f73194aba. 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/BRG7K1400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22964047ac015e7db80e487bee9668ae3b2d9397f505ee998e88f20f43a73dae. 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/BRG7K1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2f3331eda6c26d978159e94c9ac53583b234b2a5abaf0695b9031366f8bbc6. 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/BRG7K1400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ec4ab0e55e6e4e2a974677951fcaf84f8ae485e49b2d1179c7b448aca265ae. 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/BRG7K1400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea04f64cc5128ced4ebf110cd3f4130335cbede0874bf834e4a6f25b1a0daaee. 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/BRG7K1400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661f0a52c37e0382bad4044f3049b2bfad5832aaae2d7cd92a30ef2e3fc4da35. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRG7K1400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22bfbc9f0ae0d50baecb6c7d95a8d3e8aa5af7b9285f543603ab38c954ead1b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRG7K1400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f95889be5c66b1d1b75831538c21aa2a1427d599ee0f811684f215f8ec33130. 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/BRG7K1400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f22563fa22a32a3b43bc73d7778bc1098e27e438c8644fc713893edf2975fd6. 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/BRG7K1400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb8bb50bb0cfc3d0d17dc3aa36ebf1327d1f483c72bcbdd4ecba5d98c5e4e2f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRG7K1400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e16a46b2709c54cd9cbf92354b9c3414ccc22fca1e116b9afcaa935f286cd27. 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/BRG7K1400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2344c14f0bdabb11c4be9d5323565d8e2cefa577ec7d30c74bc9e54893c39c08. 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/BRG7K1400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96887d204c437f315ab0eab95bc34a3252d17abc870453e7de6a315334a3722d. 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/BRG7K1400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5b991e41432578149b7af6fd34b1fc3ab46b791e1b077facb261cf7125f9e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRW9I1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46bc31d51a6262b7c9cdb9d2b7e6ea844cfee1e8636925839111235550013c7. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BRG7K1400074.
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 0xb463bfeea12c18cb10a851cfa017b26e95a3c0917ddeeee58c5e9447f3feabb3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRG7K1400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4d9f5443c3f163a161aed57b8e3410d3a48ffd5e6305cbc1831218c68e7e65. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BRG7K1400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d168731cf8dfb22ce75ae6deb9487f6412c601cccceeb5cf40f4fa46e6820bd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRG7K1400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ecd508683ad9146e7e5340b9bc688e8985b0d0e506f336939a37ad9f54ac7f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRG7K1400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfd4e58547506e03faec4e591145559a4eb9889ed5a3a266c37e1d80d7a198a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRG7K1400086.