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 0xd859c541ab62a10d0c7bba06a915c4066ca3e8b68bfc4de329f43a1c89dfe6b9. 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/3780bac9-7b49-40c3-8fb7-3406000455ec.json and https://artists.proofprofile.net/proofs/artist/3780bac9-7b49-40c3-8fb7-3406000455ec.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 0x97c9cc704fd7fd8e5ada57ce51822292fcde7c5a752b715cbdc0760f842db667. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:40Z), 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/TCAHC2380223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1dc32d1019a11f28d0f8bf51d86b12b6698da1cbbb382597537107ad800f1e. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:58:31Z), 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/TCAHO2305492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec6b5d46712f53b119af937d3c71fe02165f19d784541bc60c66595ae9f2e5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHO2305530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d2f42e2280344a3ba7bbe5f2ef25c2fdda16ee6763f48f37cfa0d8f71fa7c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHO2305541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2e75bf33ca9945f17524d144371e31a957fc726429e3ba33c2942b11a64f34. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHO2305609.
Ballet Class in One Take, Vol. III (Latin Rythms)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8335d31139eab3c149596786ba2a4a5c4871bdc15bf4a58856e560681ddda4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHQ2371380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51ad438f77f0cb5906d00418a4389d59b4bb8842649fec29d3a17ffb0f710fc. 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/TCAHQ2371403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686d283157a7d75d9de4022b607372239956f97ffe090c3bce3c61e76642e691. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHQ2371488.
011 Rond De Jambe En L'air (Samba Argentino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d736ac56603c09a830f9bf0e5bd2974fac4f58b4f469ff0e079b7fad17b47. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAHQ2371587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27848682b916eaac0928fba94de7592e5b7cab994b92fbc6520000f5a48e0174. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHQ2371643.
Pirouette (Waltz, Inspiration Julio Iglesias)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b73adfaaace34afaacdd59cdead1de208facd949368b54755b539dff0a32c72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHQ2371689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e4193c5d8f29f8943c97efa8d2aa5a36fcf87317086dabb03ad6a1bcbb1455. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHQ2371695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0769f4e2aa148493ec4554bec40ca8d481b04de4384d8d2b27eac23a00c85a44. 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/TCAHQ2371715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd408b6540eae67ed859ffa9def63982c335944b988a11076333f2589e72d5ad1. 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/TCAHQ2371758.
Ballet Class in One Take, Vol. IV (For the Advanced Teacher in Need of Musical Inspiration)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f82481f5de3296c58dafb39d430f082773439d21a614a22e2a02422742010d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHW2435751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f6aa9eac27e82e388ee97cf34b4d33453b0426fe2d1172149c2296e7726a7f. 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/TCAHW2435815.