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 0x41f2f22aada09d376b7f52b3c2cb8d8b0e446f0532b76504b2bb2febef7ea40b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d18a4f-5d58-4b0c-80b1-89e82fd4af9b.json and https://artists.proofprofile.net/proofs/artist/e4d18a4f-5d58-4b0c-80b1-89e82fd4af9b.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 0xc5fb69b1a5fc3bf2bb006c6d298a96f99ebf01e6b7ed114a6f056ab17da1e83c. 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/CASE11500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6bde99e1b4217ed9f4284dba447672c4dc8dae5f65a67b99778711b19745f3. 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/CASE11500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fa545dc651733645c21f2b10201d17ef9d4869b0408cac848c90baa91b278f. 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/CASE11500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9987139b57ae22b56e6ceb49534c62a92605456ab7ba0828c11784d4c6505b7. 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/QM7281844359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9272b25c44baac45414bbbd193132dfe27b79681e871f8d721417c34d70e26. 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/CATO11590210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a0ecd84c08c57a8a23e20b3052eb039e515c960da3e912e62f95dd361f7400. 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/QZHZ32134491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce5043d83988c8562e70fbc9fa2b7f47f508e02d87bad3456ff7571340620d. 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/QZHZ32134182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6bb7bf84cacf821ee02bce4ffe3dbe10c72b61f4eefa93f8fae15ed33bfa15. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ62176796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d2bd01914d02f8df0d74eb896e4af394abef4efc19b95d8c66c3a0cacfd5c1. 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/QZHZ32134179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb502ad3fc778bff977e128eb28acdcccfb8d59381b5507e4abab6401bb0d069. 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/QZMZ92148982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24beeac3b62438586cdec58e665592c8ddbfe567453827caeeca0fe6522ee682. 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/QZHZ32134233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729b14d83614d90af2d624033216eb2b5024fec43c96c31ac662b121ba013ff. 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/QZHZ32134330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360159a82e35c739b9c65836803f7d1dae3f2d2691fc8090e3e97e86159997ab. 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/QZMZ92126668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbe0a7c016d450794b98a7da6856381597889e813e1c823898d93c2282499ee. 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/QZHZ32134474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080688461a945453ac18205f27b813c54adcc7973c3940e3e76c2bb008e2e144. 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/QZMZ92148983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a14d2587fc27635f61c906dd95417f3a61378686fc2362b744060344e3dc7b. 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/QZHZ32134460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df62bb1bcbeb534b0b4e3e70cfa8147bd94f867a3aecf3a4447afe140b36e99. 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/QZMZ92126623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a4346ccc9d69c63cd19c9ff6fae6bf2af4c3945009583c7c99e91d31fa1728. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMZ92148984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab536fba32823d967d7cd3fe06b8fa551ce307ab9f78446cf59ad5f41fbc6801. 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/QZMZ92148985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba71c4bdc35b28812e2ee9ff3699ef0e25cff55d79d8d117b3962cf84b2783e. 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/QZMZ92148986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8683bdecef036b03bd45a9d2d80836e4e51c67d6c219686a98a59c88d1eb13. 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/QZHZ32134605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b407dd4972beb12b9f8a30a94bd44b87553a53f34c5c4eee86e147a608bd23d. 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/QZMZ92126608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646737acb55bc5a98dc4f8f61f95b1ab8c136189b9734fc1841c8a4411d7f5b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMZ92148987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d2bd01914d02f8df0d74eb896e4af394abef4efc19b95d8c66c3a0cacfd5c1. 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/QZHZ32134179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24beeac3b62438586cdec58e665592c8ddbfe567453827caeeca0fe6522ee682. 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/QZHZ32134233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729b14d83614d90af2d624033216eb2b5024fec43c96c31ac662b121ba013ff. 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/QZHZ32134330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a14d2587fc27635f61c906dd95417f3a61378686fc2362b744060344e3dc7b. 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/QZHZ32134460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a0ecd84c08c57a8a23e20b3052eb039e515c960da3e912e62f95dd361f7400. 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/QZHZ32134491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8683bdecef036b03bd45a9d2d80836e4e51c67d6c219686a98a59c88d1eb13. 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/QZHZ32134605.
Hierba Mala Crece en Toda Tierra, Compilado de Skapunk Latino Vol.1