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 0x2f506898965e181d40bbe0e735e0fac6675025e4cbde5fc4fd2c144bea871799. 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/862d45e5-901c-4e63-a925-2401bfbf8935.json and https://artists.proofprofile.net/proofs/artist/862d45e5-901c-4e63-a925-2401bfbf8935.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 0x8aa6cf49732739a629c0bc59bb7bd2ebf786d246592e4972d89b2cec3cd7de52. 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/USDBB0609718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb6a3e1b64c5dc13daf9adf7be025f53682e0c9e447db9ae14b25fee2a1dbe. 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/USDBB0609218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6002426bf9733ef7fb9008e0ac2bcd749111867ec8fddf7337b063cb78057f84. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3Z40800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb613fd891d765823596c4ae0119ff85d6b2c5ac34f32c0b7c54f0b22363eccdf. 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/US3Z40800293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44395c8189a11d3ea25b834efa5a40ab73d5e8a28e9cc34d0f9419283b3381a7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:42:06Z), 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/US3Z42300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485203a3b4919a5e8c0316b8a1621296c1d9092475740d4454d948a23f2f9db5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US3Z40800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a89b6d33335948f7eec3428345dde7db3d7301874ea27202d031b3da0689b0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3Z40800614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04e520012b08c6946c94781821f324dac0437d098b26f63f8d14554a355e4cd. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:25:09Z), 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/US3Z40800615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1e082759c561178587ae983d9c311170b21ded68a3b8d39d79d0f5cca9898b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3Z40800621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca6e9eabccd302da325a83bdee1653418e166be6c9c77ba90470bc6a30b4c63. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/US3Z41500476.
La Cartera / El Paso Encarnacion / Tu Nombre Me Sabe A Hierba / No Hay Amigo - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e29dddac968852cae7f85359a700608a7dcbb6542b378de9ed44e7843f522. 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/US3Z40900369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0dcc8bda6dc83809d65748421b31441f2030211af94d494aca488d683a30ba. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US3Z40800295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca736f30ae39e16e10f8eaffc6a91e8e3623a6bf7570034b41eb0e937a9800ce. 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/US3Z40411041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f406ea50541a252a0f2563a2678b829d1108e5a2b698399193eb7e9257954d. 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/US3Z40800619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70701c81d510aae49051c20f25e2bb6492cf1defbc4f9cfb107edf98561689d6. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USDBB0600871.
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