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 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 0x58227f151b02d5db46b4d205f2b9a44abf8f6f172e278f5e7774397756fca70d. 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/7958dc54-c566-417a-be25-cf5b815b0a39.json and https://artists.proofprofile.net/proofs/artist/7958dc54-c566-417a-be25-cf5b815b0a39.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Grenouille Hypnotique Du Sud Du Sri-Lanka
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 0x82ee9bee059c1793b6c95de6ba54d38bf25333e4e21ccc40134ef25f770970c6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHJ2344182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9902c048a8604390b45ac818748b6b2ca278ff43654c5451ecfdd6f01c38848a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAHS2329083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd07e2d8521aa9431c763c8de22196b7740039827d003fd3938545e2a149afc0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIB2493541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf16a2c75aa136ba16af4c433a2767090b34acb6894c90f199f4d95f810d7bb3. 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/TCAIG2471587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39821fd6d5177a59105bcd194510b1843b25e9d6f917d813ec935ce8bab28421. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIJ2473099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582b32a98fbee6a331b2837027787755a4ca6bd9277d0e424882a128068ec5ad. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAIO2493963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf810de0cbb3eed44dc22a33770814780f18153c514ff3501407c620ab5f57c4a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAIS2427197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49a70cdb4f1c6d67c5111731e6afe162aa090dfb286002d2eaf75affd49ddcb. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM8DG2501978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4550840db8ba237587e27ae4daf4e176bf5370f1b69c5c6a63c5f477061835d0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QM8DG2516382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3440801efdb427eef56bf9b7704000915644f3a44a37afc0b5e7b3e73a5f03. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJG2585551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31bf4412bec220e5d70a23871e79a57a504ae1b8c38cfce7e7d1702fc66d329. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAJI2520903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4882e2c077b111dc317bccdfa8b98b1c9a127bd5a9e4f33ea2228fac140b91. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJJ2553771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e128ec90d0724f50f798424d2f7f7a9a1daf7b2ba4d05af4421a76f758f0b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJN2561478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1953adcff9a4934f36f314a1f8d1f4e039bcf37766ce7c2d8dc831d0ba56a034. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCAJT2578756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5e869c4ea531fc3047509b38451a9bf4804aadf76294b7af2ecd237c7e1e1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJX2562098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d318dbdd9fb1b7c45787585b88e494f596ad79279b431c48d4413ee1fc10870. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJZ2500443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2da6d7911a15d5da73ad616a459b3ee95fbe97b5c991da3410309b562a11535. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRPZ92547680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b1fce9047a84931b6be334d125188df17de2441f166a5615261b4d49ef19a9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRPZ92550680.
l'étoile des vallées de la montagne au lotus frileux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dae27e2bca3a1d9a002e19231987978fd3cf91f4ab12cd6c971c3f204dd0db4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRPZ92552620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce9654a8e4bfe9689621fcc533b7b36611a1c00e5fd43e50faf58eb0e3c5b7e. 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/QT3EZ2449172.