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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 0x5f8dbcd91cc8f96f0e3e7a7d9ba8296f6231b8d4f3a0c5875913dc2585faa8e2. 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/5c3d74cf-876f-4ed7-b41a-3f3f0d7b13c4.json and https://artists.proofprofile.net/proofs/artist/5c3d74cf-876f-4ed7-b41a-3f3f0d7b13c4.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 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 0x9f875a59abdb097837937480a2ed0b13f2b5d9517ad40ca6cfd9726ddd217935. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZMEQ2212256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba75a404fbecd9e60f0d0d1f65dd821e244c2113db91cf05ac2d262e33735b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZMEQ2212257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26753170d48c7b3c6b09dc698161f3c84f82b7d7bc6675915805f3d15aac9a19. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6P2434448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa823b8100d42803873618aed1f57facf52f8a2df08bd06b51fb5abe425a1bacf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FREDS2499910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db01936c2194421bc008a41636d840916d26cb50bd4514fba4bf098471a91a. 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/FREDS2499830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579b4b1e72d5cf207f041cad77c6e7efc954776b6bd5bf7916f8a2e7a6af552. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FREDS2499760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae5f77d8ee84d5647ece490f5d0dcf891edf04a66eb1a14fe1b1b69719e2afb. 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/FREDS2499770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa823b8100d42803873618aed1f57facf52f8a2df08bd06b51fb5abe425a1bacf. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FREDS2499910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562d825c740334b590a287b46b69cd802dcdf86ef2741eb64d7b26afec89e10. 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/FREDS2499750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db01936c2194421bc008a41636d840916d26cb50bd4514fba4bf098471a91a. 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/FREDS2499830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6749c617094ac18041d066bd3bd5b435fb76715eaebc032bf9734f820fdd4a5. 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/FREDS2499740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef342e7fcd74323041dfc02ba0be97f5f7e43805cf6080c2b960806556d0c6ca. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FREDS2599980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff37a29166c4082fdfa7a46f2989186e57773033de999d7cfa24a27f7adc7aa2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FREDS2599970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562d825c740334b590a287b46b69cd802dcdf86ef2741eb64d7b26afec89e10. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FREDS2499750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d6a6b3ff458db90b5c7de0fe9a7505ef7756fc8bde075966df531010006ce6. 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/FREDS2599950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569ca0f7117bf006d0b8b0314901adbe0e778c0a859b1b9c790362ed5da98280. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FREDS2599940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa823b8100d42803873618aed1f57facf52f8a2df08bd06b51fb5abe425a1bacf. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/FREDS2499910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c27fd7bd22916a990645b85aa6e504ef5dd30463d05a8e86812fa8c34442a4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FREDS2599930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322ab6e4d6150015729543f8450b03052dee6d595cba78350d3acaff10e3178a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FREDS2599920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2579b4b1e72d5cf207f041cad77c6e7efc954776b6bd5bf7916f8a2e7a6af552. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FREDS2499760.