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 0xba5144f1bb0fde7f6e0f9d10630c54116bd7e1665c150d14fd87235f0a1d93a9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d249d40-dc31-4315-8bf1-760dbb972b7c.json and https://artists.proofprofile.net/proofs/artist/1d249d40-dc31-4315-8bf1-760dbb972b7c.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 0x7a8eee236b4b942c6c99d0df4c8f28765af2dff947e15bde03b4bb7105d70f79. 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/RUA7C1806249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775e4e0875263d9e2422ca6139369156232e0436e685e4f91f4cdd0cf938feec. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:31Z), 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/RUA640904892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b938940b1def5774acfd7b70419a8ec772675fada7c99c7b7284b1e9988f19. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:55:38Z), 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/RUA640904893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac8e045ff5de62f044f976cedf46005dd671c2b8614348af7a49933b9809d59. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUA640905743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d671a5e21939ab64e5d6f84c9c6ec567a194d9e849c8ae79779ad84e2f0341. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/RUA640905745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20432b78fc6f0afa6e33da66ad86b5ecfd0ba9e3765c5c8183e9bc3f00dd94c7. 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/RUA640905748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8d1e054d294954a06b451b70be8573ecc1fb8bd67b03ecaac217c5b0004599. 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/RUA640906192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48519a60a8e8dd85ca65cfa88aaf0bf9009db020b33790d3ee0b0eca9c8bef4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:09Z), 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/RUA7C1914090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed735c145f35158cdc4f2357c643a25018863aa5465b652fe5d6c0c58038022e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA7C1805945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3643178d63dcbaaef1327d88f995eca48cd7c2cc303814c3676884496c2ef21. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUA7C1805984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f00cb1164e299b3dfb72ec4a715c42723c565267cca75dbd97bc7935901c0a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/RUA7C1923223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffc8ccbce6e29103bc6620db78daa51011fc39c42403599654966d91be658c0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/RUA7C1924699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429756fd23bf39e825ef5c74da3a20e68a2b1998589d497babb10c0ddefae973. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/RUA7C1924700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a2ca896dede7158b32c4a4947ffb88711ebe1d9a76cdb96696eda4705ace7. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/RUA7C1924702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a64191ed6d16324ab61613ee9892684ba6c2522f6dfa5a2c4b8ad611b16cf8f. 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/RUA7C1924703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6291cca0db1f07aaf5b2d3ec5000743f1103291c8dc70746f8cd1dc798a9674. 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/RUA7C1924704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c505b0cbacdcd9a4c051736b27367b5ea2f136be5e65726132f3c6d769ba11. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUA7C1924706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd9d2e4e32e2312844e2bdcadb9aa7390aa7aea83af75094793f348f0c3d7a3. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/RUA7C1924710.