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 0x39c3c8f8a7c4ca99cd2ee4810207128e9d53ca6cc8c0bcb44ab8ceac33312679. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1290b6e-8199-4e8f-aa64-2fb08b3d1885.json and https://artists.proofprofile.net/proofs/artist/b1290b6e-8199-4e8f-aa64-2fb08b3d1885.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 0x196b2415ea01586b93905e3939cc0397ae82b231a60db7f94413cf86f7b678e5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ZZA0U2368605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd302d967300e1cb7bcfa31b7fdc015b6c0870af93b695977d0ad0b4a0f054cb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:12Z), 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/ZZA0U2368609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5327cd0a17e01efca48a24659e46db7486a1200e64b02d1a849d70646d4848ad. 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/QZZ7N2485218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce5b68d2915669ed342dbef4821cf216ee02ffebb16701f54767bda437815f6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7N2485219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33495efaaf2f9724f266ea6e0d569066945278b4dcb079748ec7377d1057dc49. 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/QZZ7N2485220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60255f23cf7aa6ea8147e34f36e69fb5fdce19579d4d08dddb77aa49789e6536. 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/QT6E82513554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758f1836b3a3748d852045c616a1a6c69923014083321b19daeb5b93f832f770. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT6E82513555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f8f5b24e278c4fb7fbcce428233b62c761e9b0d1f8a0b23c1b35ea473d8b9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT6E82513556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8307a8e57fff3ed9d3f0869fa32e2b0d24e00567f352cc1fb2644449b5df29e1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QT6E82513557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb03602e05521ab366c9fca08e0e98f1cc3fae933e6adee1bb5a5661343b8d0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:31Z), 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/QT6E82513558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bffa311ec80e95bf978e5b4392a667903ff0e8255c68a89e39344579ee441d2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QT6E82513559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6010e43614aaa86a06b9531531978b81f2fedd1f911ee7bdd0a8e95312907717. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:22:08Z), 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/QT6E82513560.