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 0xd7a2bd04b81e77f66f118dbf3965ab4812e71662d1f02d2b8c75a5b7aad88ff2. 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/05908aca-02e8-422e-b330-641127979ab9.json and https://artists.proofprofile.net/proofs/artist/05908aca-02e8-422e-b330-641127979ab9.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 0x7da52b072c6413f5cf398dfdc4920ac16266eab23b8505632bac8803856cfd34. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA031102711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41f7059bc5898cf91b842155d7acc6f414417ccf363c5ef3ebffaeeb7e24f68. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ESA031102805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844863bb1208eac5b6da4bb83c351b5c8b8422fa04d6bb5a4541b9d5f7cf2e49. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5591101325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae11d8d3cd74b6775d30aa1bc13626b0db3c3a6a8e00ad9972ffe098e14af11. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:38:08Z), 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/ES5591101327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5e76a5d79b9bd7a934a50a81721c62b1742cb9535054d5e79cfcd3467ec2c6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:35Z), 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/ES5591101335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1f1317d9ecf97c83bb02f1921ff4155402fd704826f1ef568b00bc5ed14226. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA031103103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26134ab2bbc77a01c8b28c16926e3a6c9dedd1e2af5f6d54c3a7bdf1e4b0e1bc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ESA031103104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c57a966ab7f2d53cdca0567b5854758bb6a07df365cc35994f07c6c3f71f9c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA031103003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe27ce4c1ac2eff6569bbd28b2f909a36db199ece8faadb54b990b7cee6f3293. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ESA031102902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06efc23e543cde1ce2cb309c07b5ada9aa7701352460683ef6b0d375cd93fab2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:31:31Z), 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/ESA031102903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf1d7fccb52d41a7f49a38384d93a17ada9df5338f7fb722fbf03464a7a59ee. 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/ESA031102905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a526359b9654e971b41930ecc7206133fc35f963f69c0ff77e3bc0ed570b121. 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/ESA031102906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82da56d362103d67fd54d6629e334cd1628e8b5059bbe4bf5883f3795bb2a056. 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/ES71G2423859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61844551395c3cf44dd3f440b33299bf527b60166559ffbafeb7c5d3f83c0c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES71G2423860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bf322949fe769169c2f2a6241edc9176d8769c0ad6169de6c20a4f26194d13. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:30Z), 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/ES71G2423861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76afe588b28137b5c9b2b8817137881fb6879e6d469c54e599e334615cebd452. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES71G2423862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4afeb993654eec2bb5aff9dbf18a7fbd5d5bf6d522a8fc098e75b4da851951. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES71G2423863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bb3007c8cd15be47a67f295aeca576104ac59de12809d0aaa06abc75b85186. 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/ES71G2423864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66de5bc979ea4c1ac02d2d25da5b49393cf4915230679f9ebed41408d9accb9a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES71G2423865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a1bf87f0e39db512b7ea0d9302b827e56d5ba6d6e26416a78b1b12b01769d3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES71G2423866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3548c62b9350f85d5699c4ce1bff99ceeda975d587f82a37ef9a688ce2e22620. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2255423.