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 0xea7566a56fe926e28e2b4508fe558b3f9924da2372ab4d388072c5e71c8dd763. 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/61c502b3-f797-4f85-b52b-70876f7b5a52.json and https://artists.proofprofile.net/proofs/artist/61c502b3-f797-4f85-b52b-70876f7b5a52.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 0x2a450721e7656995752bf2e00ecde29be04f5dd2519ea5a6116f5d03cc9e657b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2529647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf200f7bcd0171e5f786e85cc5275b1161cc814bf88ea5d5d07942214af013. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6N2572334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458b0b49f7587cd7ccbab674064a7f48025d94b365fb0041f0ba54c5555b5191. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN72500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0469554f5191647e991ee0a3a2d13d39fd3a14b7424151758c634304673df04. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQOI2502280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e6f25b8d8684ab181686eb88f936f3bfa804332f92aafdbea524e6f69b1d10. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2511990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a2b22dd4c35be265a7c6c5e8f3439e9e2305993445e42470c6d397e8e0077e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2510083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19dab747ee7c13a39ddf8618f139e6f59eabc10a06067bf85c00f2ea4bff074. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAQOI2417702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75331d038c8636f977bb02722ab5f1ed82a1e192aaa14d2425c8caf57cbd7c4. 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/SE6XW2409098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7311eab59a325ca3d1aa740bb7350e1c3c25cfea54c0a9081d4a91d5e6a715a4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52419184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c77a68456afd63e298a9120b7b0efbfef7363952fb2a4e17db6d72e38cbaa12. 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/CA5KR2502316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cb76122d683104808f4e1d06e56e18d547e68009789a80a54b869777cee533. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2501355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3e8309766c635880076bbf485effae9b4024f70e5111d50fabaeb647744caa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAQOI2413474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf6fc6aaf12471e2e1b8d030baec19426555bc4d11f4c5eaa4bc65c8735e8cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAQOI2413476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94abf677ebf2e8ae4e9ac6412637c66a52caca8e7e70eee3fc0b8a25f336b3e4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2414983.