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 0x05fe4040d200ea057e001eda5d53d47c1b84badae2f7d89e4d020c5456b5296f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6f4ac5c-873e-4dae-a908-51c2479cfd7e.json and https://artists.proofprofile.net/proofs/artist/a6f4ac5c-873e-4dae-a908-51c2479cfd7e.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 0x7718dd3ee203c3e232f4913cad6e334602bcd0bc7a3e1c6d9a3392d8d4ec5285. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USETB1700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638f26fa12021d990fe992fdc484fa9beb6dbc1230e1221c10b500effc9e08bb. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:09Z), 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/USETB1700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75370a04b99fd1fd19a8260d373fc3d0a4a52ec2078c26cf280bb09b3e123a51. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USETB1700278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd18601842585d87d5dd71ef57628f0952dabccb4f5fe35be3f11cb922442186. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:08Z), 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/USETB1700279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7e7f84215075365592595004f6e3424ee0b60207e6596b73e1a70ea3e73fed. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USETB1900076.
Great Confession / Even Good Men Get the Blues
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf988bb620a1b4ca0a66db6bdf5a4039df6d05007195e1fbcd981bc7a68afe828. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USETB2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20eca6d5d9215b25b4ac12ab7a38875c5da176430fddf59e73de8a56fa5722d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:24:16Z), 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/USETB2100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee47c90720720c04e70ab413276cff2e3d24a529114e5104c8215654bfed96. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USETB2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbeee37d44ecd0f1933b9b1f24ccbeb01c62a4f4957533ab1b208a2b5930bad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USETB2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1e7933da9b79a4c051a173e7b6c38bf02f0edda20d9ffcfd0680a300ab694. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USETB2100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5f540c15061a3d4759eb112bc08a814a0dfb64ea84d6586562ffe1ac0dbb2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USETB2000228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6788e2bfd9fbc790a9d185612e2ac1692b13002c880bbac33fb0e8557f5f06. 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/QM6MZ2369369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833719f9955a6593f572bf291b785c8d3e9f04bf941bf3e25339b92c7192199b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6N22451235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8000d7efe40b13c18c74c84d66285c8dc5e21fd39d5d50666dd9a15ac0f917c. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:33:57Z), 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/QM6N22451236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c985ff60cd34ddf72a520f934d028f9e28b9bcba987fef09272bcfc5956af. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM6N22451239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a51238c07d2ce3c02150315067c50dd177f76522ed60abff9d2899abba8bdc0. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QM6N22451240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8105fa84109a65cfdd867f37707cc3f1c1145c8d52e3dde62b9f1d774787c41d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:10:26Z), 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/QM6N22451243.