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 0x74447a4f70ec584d1e321409a51734b2ee5b5b37fda753186c329bf8c8c5e767. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f413cc2-3191-42f3-861f-be0a466ddd16.json and https://artists.proofprofile.net/proofs/artist/3f413cc2-3191-42f3-861f-be0a466ddd16.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 0xb0052826dcf6b2bf84b244661a415fe82472f4bd8dd3f95045368cfc38294f84. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/COC012236618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e6965d4f88be5dc72c98e77c0184a1b120b84c86b73b88758d512e8378b36f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/COC012236621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc60947b8fe138d40b389acca6735381a39f1804ad2b9e204527c0074d7f8c9. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/COC012236604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5d4a6552759bfd44c2e84f98c863b081f8478e546c808df924de7d32b3ea3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/COC012236606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4100096281f792a778e39e3d2a3af1e03fa40fa7496292000c7a82d943a710d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COC012236607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f19c20be1b1823bb07a1c0b868eb681934f1a88d91105336f0b88e7f93235. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/COC012236608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc448b6e04fe99fca796cf156cbf57de3ab23946940805b8b0511859765ce1f0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:38:41Z), 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/COC012236609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697fb79f078e553666a4894fcaeba0fe73c82b7bb847cc7e29195e125b5233a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:48Z), 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/COC012236612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57b9e643240b3d109fd2775e60d1fee6c76583a6794c3267ca870b4c53e19f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COC012236613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4fb9421fb777ddab0686f125cdba12e76eb0255db8a0e6eada9c06b327be65. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/COC012236564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf702942f66ee15656ffb01bf79f5a9d06cd1cb8eb716316d5d52817fd00ae0a0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:05Z), 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/COC012236567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa027f2390578cb3c9f08cbbc628972f7fb2d6373c04e930ce529f5de5d822635. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:06:08Z), 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/COC012236570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d483e7642e0e92ca976393492f7e30a11e37e4014710789cb2d37a0c07449ed. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/COC012236571.
Pablo Manavello: El Camino de Santiago Llega a Ti
R. Strauss, Handel & Brahms: Orchestral Works (Live)
Concierto de Aranjuez for Guitar and Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a7ffba2a52de6470eee5eb80e1326d8df2b8c30e7064848a46138d8300e51f. 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/DEA580800159.
Alirio Díaz, Vol. 1: Lauro Guitar Concerto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05869317809dd56dd3ed65c46afd2cc6e7db90e60782abea76588c842ad8cc25. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CAAGN1699701.
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