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 0xaa102d120000ed95469a684048e9c05f15050c7474031ca4449cc231c24dd4f9. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c37d1219-4845-4d4e-860b-123f20332b5f.json and https://artists.proofprofile.net/proofs/artist/c37d1219-4845-4d4e-860b-123f20332b5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Humildes do Som Coletivo, Vol. 2 (LADO B)
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 0xf9dc12d905dfa55606af1feed7c8bc048287ec4a3fbe06d82b1dc9d011c973b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES52442099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e8577955f879efca363ab12e5c44aa4ca49b8362a6f949219cedc0aaf2c30a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES52442101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecc9380a4ed2b58d7edb3f3610541859aee2faafcd64b3214cefa88b0f726a5. 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/QZES52442102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ba69b4d2335b3a564f95f3ae0265697200f15e5da269b7a87b299c620a5bda. 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/QZES52442104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa0e0eb21f1dc7761f5d4b52187c35a84a3bc88cbf6c52ffec1b81a9d26f108. 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/QZES52442105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c8f9875197a3690a7246e59995d9e2ecc7037f5cb99ba00dcf09386c719c0e. 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/QZES52442109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddef4cde0562c92d362bb6986e7186e305486b893239bcdb7a45591a0179af82. 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/QZES52442110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc80d6fd10f24570c4c33b893a98261b85d9db20a29dc02809872cdfba5a118f. 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/QZES52442111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e160b328b1d2590e5b030ee2518b7e0969d74c69a933a2d281a8a68f965c0. 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/QZES52402875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38c895ff110840c6281e1a3d12ddcd130d92d91c0eb79101ac57876dcab2ff4. 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/QZES52402877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f60375e175586b44f82d97e0df5af922cc4e6fdea4e47244a96a7a36f7e49. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES52402878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca3290a206ed1694126f55b26a99dd7cd67a9dc01525d755bb25c3e819dffe. 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/QZES52402879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9b23d96e92dd9fbf1768063d362f91984412127e34ecf30c84b99b4820bb7a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES52402883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62394d63165ce2241570da716dd21e7ea9780c540ba95898705cf5fb6e029999. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES52402886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc6bd3d9b67a4bcac31881bbfd750398f79ca5eb0c21399259473e79e58e831. 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/QZES52402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d011954915fc15f1086021ac0d0c2960f0d3bdd485949cf1fbc47e0d604e86. 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/QZES52402891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68fe260e7624d033ca7b8ab56ef3040403fb2fc48216f690a21fe021e06f9de. 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/QZES52402896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5b716b11652d6f4e369edc33fef1c3a41daf4a7d4817958a0f12123f84fb3f. 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/QZES52402897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b2a496bf6459669a9f0d3573669bf77df4c602a039f2ae4678a6a706a25c06. 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/QZS642338843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0e401d73ebd0a9ea806f473811670f667aafea374e19575118a50ae58b6f5f. 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/QZMHP2363692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c0d50ae40aa540459bf9842fa68a45d4b51308c31298ea3b773d6658b54a5. 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/USYBL2400948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b75e071fef175461447cbeb2b69d4bf10da953b3871bd4b388e5ea947603730. 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/USYBL2400533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffce041cfc9a2e1b0b3b88a0d94331c81dff29cdcbd6ca5d91afe7ed9b14b02. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USYBL2400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653d887d7cf87849d0fbc193c5d622887eacf705264b73279765c5183b10bcf1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USYBL2400949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa554378afe358b2be5c7b95ba9e467582f07661d2b78d8568cd2abf5c1b93bf1. 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/USYBL2400951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf933109720faa0c6636898bd2040c9c1cf24afc3be39b2bedb9612e7be7606d0. 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/QZ5FN2475787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f0d636f16134cdedd1b5e847d8ccd60d31337f5dc2c72618e2c9a1ce966d31. 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/QZ5FN2476456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9927c73fb369e7c0894fa5a102a180b9f22c2e592e499f8bddb581b39b1ada1a. 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/QZ5FN2476613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7198d2d0f5f75e7085b397e920f88f449c448b3895a65cd2e19ad28da949b33. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ5FN2476927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d5f8bed51debccd2a92cc2090a6d46443aaade2f9d9ecfd5e9bbdedf2a67ca. 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/QZ5FN2476985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba644ba814b34f89bf1c09d6caf4f623968d7685bf83de103fabde8281fd70c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZ5FN2477071.