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 0x9475422e6749fa45e2bc42c1679b5f2572a96cb6a68e22fe3390e7651f9bb6a8. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e5421fa-571b-43e8-a961-469208521bbb.json and https://artists.proofprofile.net/proofs/artist/0e5421fa-571b-43e8-a961-469208521bbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Synaesthetic Trip, Vol. 2 (Beyond the Predictable Touch)
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 0x938061b9c3fb5480b2228964cd44e8dc963dc9d56d8fc1d718c7a37e6da55f53. 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/FR1F32400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf3c4847642631dc7e527da28e32f293d66c52c0b10c39e08ce4befe901760a. 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/FR1F32400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf60531cfde25098161ad1ad28f2118b3abbccfacb2981e13675100cd9f125. 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/FR1F32400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe415e5b4f98dba1f40d678399e96ca909bec5906b052fa77578ceb7ce0c147. 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/FR1F32400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612fe627d01d6163af17ae17b286da17317ae6afdc7b248085e30cf485fabc66. 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/FR1F32400020.
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 0x0ad43ce2885645b8bbb5841e5bc5b5efa3d846f24791e0e8e3fa8dc1f1e15b14. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/FR1F32400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bef01d3e3bad658a8b70e2a60b0794595de86af0b5e4f16c90cb9b916dae74c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR1F32400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f38282d1ac2b28aba6843de685721a148fa41c8ce3399818127eaae56e2ad0. 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/FR1F32000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69dd6332118ab0831dc3b3d29464fe69d72e44990e310a3b53a7d3224bb3db0. 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/FR1F32000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d0fd2718f83bfd3666929e7b23fcbf76b28cc2914e388357401818aef4f14d. 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/FR1F32000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06870222371d18fb2a3f65d12f60c65194b26fe3555d48de29be3d5added68a7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR1F32000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba4ff4e51fe6700d969ad69a4fc36b247bcd3d2c95e21d6f9b0ded87ad533e9. 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/FR1F32000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942b78367b1cdbc6762066afe426e677319b558de7ef5cacf09dfce1f5974698. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR1F32000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e57bda3a347ba06cfd88517b534e8e8f8f91465573b6bf8a1c3b592d48256eb. 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/FR1F32000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b6659363cb28dc5010e9a118929be97b8e8c2051677d864458e3b77c327da0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR1F32000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedd1aa9e006c9af861ecb1b2d7547b2dc97ce1992229d3dbc81168ca06b8126. 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/FR1F31800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8dc628beeeacb69c22ae2dd68c70f4362ce300a81519d6c0e322217def7b23. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR1F31800030.
La marche du chien noir - Hommage à Satie