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 0x349b49bc421e95ac801383dfb31d72d0ace47939fd25cba16665770ff77ecca9. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce3eaefb-62b1-4b2c-bd7b-c492d200db93.json and https://artists.proofprofile.net/proofs/artist/ce3eaefb-62b1-4b2c-bd7b-c492d200db93.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 0x7639d17f5c93a7acdb8250501b2e9306091a619e77629266825b15c065d6cf21. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TWAN78060351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d5a0179debf12402118556104f984dbf356292a92cd44eb98d2ee96365674e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TWAN78060353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aef04a1648dfe7bebe63de7b0cf4a816ff4640d6b2cf4f03d07dfcfe85342e7. 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/TWAN78060355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9253c15e6f488ae4be1479f90c26f64d027e51c7996897ef8bbb24c35dfb108c. 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/TWAN78060356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c35b128f47613c992b583b936ecb8e2e78aa377b685c8ffe4aa4b6e637f026f. 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/TWAN78060357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff599f960b31a914024e3b03396eaadb7e7159ffc6b797be6ae1fd0c05f4920. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TWAN78060358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1a780d3e9d890260c6eeaa560d2a1d2da0700fc241069e663b68693173ace2. 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/TWAN78060359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7907fec4cda889155acc53b0d8068f9d993eac06341166e121644ed98a136b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TWAN78070088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde165c829c778bd33451003187487373deae6f7f465d9d2a6c0b03e475d631ea. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TWAN78060360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de45f77e1e7d00828d44a100fc9a553c13093cf1c9763424300bf7ccde6d889. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TWAN78060385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7699be8757a123fc60736f76a85c896f2a99a77d23fee1e55259bcc55f9db2f. 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/TWAN78060388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09358f5072411dc4058d4ee82d049e81b7c0b3fd96b02aba2d8bb07cba221c22. 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/TWAN78060389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdafa043c0bbb98196b082572cbfaf3627da21c256dd7a35a1b1e47443057d76. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TWAN78060392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316d8a6c3c2bae7580ce7d2705fff72eddd237ecd448aab3a411323ec2c76afe. 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/TWAN78060393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014be22c4b889615f7e4e8d6b25a94fc9cf54781985c188fd48156e59ecec411. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:33:48Z), 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/TWAN78060394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b50b2bfe15fa15063f96b306d47fb7d37685994d8a6d1169095694a3a5fff84. 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/TWAN78060396.