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 0x4bc69731188fff17e37b3077763a83c91c77c25ddbc2f6e824aa222845f625c9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57f419b6-7943-4536-b894-7ab932a9d230.json and https://artists.proofprofile.net/proofs/artist/57f419b6-7943-4536-b894-7ab932a9d230.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 0x356dfe05ae17f0c972cb8f0d9c426714a0a129c01b628ced9431d06b20c3da3b. 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/ES5062413001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7eca9dbe955aa19cd7e557846cf8d6c54e0b3f99051b9b69f0bce4efd6b436. 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/ES5062406201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecf3e6fcad44ce3694ee97fb889436e36d176264c8f975dcfb91ed3434b080f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5062410301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596114126cdbf1f5dbe1e812a27aa523ccc4dd80eb5d248cf245f2b1b183f36. 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/ES5062411001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f316846fe7919678da0ec3df28197a604d3c4dd09453414972693801b39e4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5062413003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b0928bafbf9c5e0c2c5cd74af6416838b1896910ec90edd72bcd6caa29ea59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5062413007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93583206d4dd18b21002741e379cddc0a044eebbec0ef8118b6070c931d8ad38. 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/QM6N21756370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45340fd778d20c638ea5f8b2c433e9f63688a567d5f5d511daa5aed2b61b8ffd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6N21756372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7c6007a2bd71fa6d3587b4aab59aaf99dc8ed290a19278834f2be11915984c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N21756373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57b93c6c2f92a17375936d3fc7f9b56d809137c29ad783c4fdeeb9105ff1700. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6N21756375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd7bfcfd744f098f9303208ce05dec20144662498fb2426eb3f9e00a4def95d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES09C1700224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae2115cd3a54d754bbd3d11f36aa8dad13f76f5c3da6773e88ee741a8d6e1fa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5062310001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9b48e575024932379b03d17f0d41dfe3efc967224bf5437b39d35e86d340a8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES09C1700251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f15a666fb78937a42f6dc1cf3ea60f26316911c7160ebbca09db41d1d76efe6. 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/ES09C1700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae83bdd6fcca38149c2590015282cfe859bbdfc26576344f172fd7d525b9752. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ES09C1700250.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be6db9127cb7c39170e47022d7086516c7dde39bae61ea9feade01507a01243. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ES09C1700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b685fd111e9ce07baf258d14bdb17aaf0b06cd370e98a5cb9a2d810de81964. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ES09C1700254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903808b876c908f1b5a94e727e635c6b6171d65a84ebb42f857e8543a2d76e93. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES09C1700255.