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 0xa33e54a06080e1c26ace4b709b8e58369ee79c00f5530ad5ce85db12c39ccff1. 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/e00af6c8-8820-4f09-9012-3abe9fc8fbd7.json and https://artists.proofprofile.net/proofs/artist/e00af6c8-8820-4f09-9012-3abe9fc8fbd7.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 0x55ecd1fed0c04cb7cdfee79f2dd3b1d46b9cb3cad364afad1f977b2ac54bc2c5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:05Z), 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/QZNWR2056940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49022a83bc2bcd1c8d91ca3704823fa8c989eb2deaf1c43fc722aedccd361d3e. 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/QZNWY2035353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd9ba04cb6ff7d2c0d74132233ce5fd2aa6affc631bb0705bbc47261355148. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:00:01Z), 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/QZK6G2397202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c1eda77afa7852423b33a2371a537395bcceec103e0e8c0c92e087c67bff00. 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/QZFZ62102730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c95544a6d85a29c86d242bba38953e88767c9d769b62ae3cd4a7e012d54e63. 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/QZES82161610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97666c8457a52c2e625632f80d51f6fcddfbdc708c9f21c5caee43d17216aa87. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:31Z), 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/QZMEP2175941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79fc49560c54b9e6b63239958a1824bb4f3b5d2f1a9a07d545aec94bfdf9fa7. 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/QZES52263353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b908a173b9474c18a0e2e919c349c9b5260ad4b51cf62da9d314644be2a9e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:15:48Z), 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/QZES52263355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11a3667e269781b56a9dc402d328c7cfef1c72803b4d78f598227e8ac36294d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:28:45Z), 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/QZK6P2410793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe10067a9c679eba211f7d29d91566df3767f763b737d093bd6b7f9b7449f33. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6P2410794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c63708a54ea1d0c72bbd72335414db1f8b0811eeb5cf340a288a8b691bdbaf. 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/QZK6P2410795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac40432a4541a76b8a05c5934aeea6365b156eda10a7965a6778e5f4526ee2e0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6P2410796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaafe2a106d7ae96ea49f33b901cc48544c6aff96ff3a1f55ec296d01806a64. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:17:30Z), 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/QZK6G2403605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5572676fbe79c08a33c0f74533e57819e966f001d6936df63d8c15d606f89f90. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6G2403606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8921d868192cf49b6c695a87021e12c414f075b873fa2ccbc44d788939fd894d. 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/QZK6G2403607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7e5e957e937215b57634bf7004a81c742c289ad260e82758527edd6149dee0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:19:49Z), 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/QZK6G2403608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3461138716cdb1b427ef41120256e07da1242b0d69e3118c1dab56399e925fc4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6G2403610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f949c58ce96e32521a2dfe852331102cb5aa7b178e8567c1acc07897ecda28d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:49Z), 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/QZK6G2403611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fa72780326babd8e2ad97944600138f635b6ac3ff26fcf26eea5a1988717b2. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZK6G2403612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea3def3a420b54e44d435fb3ac1f8fadc10caa4e6b354621612c46233cf86c4. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:06:11Z), 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/QZK6G2403613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94257ff49cc2ef44edda50d2cc000a458da53193204fbb5286e9e8cc1b4a95d5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:54:40Z), 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/QZK6G2403619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ff89e1e07af3c6cfa9ce5d7da1630c16330b0b380f1486d2e2984c9cc1fff4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:44Z), 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/QZTAW2467558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b41efd66bb676838dd28ebc57e2a27784a5531dc074cf29dec0a30ee374bea. 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/USLD91775184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db7fba128500c51a809bf1c2b2e02b5fa5035d675c6a9ca623c4f8ae18c67ab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USLD91775185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe253ef06f6c7ec4cec8f64b47d86df9b350b7929a6859ede71539f3be5e0f6f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:18Z), 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/USLD91775187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0289ec4fda3b8c18af1746b25fb36e595f88048d9ddb360920497c4898744896. 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/USLD91775194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae250fbc16ec6b6312795663b576709ccdb99e6c55b65f545a30f1ad03af6db9. 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/USLD91775195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4606308937bd4a35b2d61425ed10fcabe7e459545ff30c21cec181c766748053. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:08:58Z), 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/USLD91776451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd962571d266b330298f94664b06f8e0a0389c561503fa5ad3b3e7c24606be5b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:17Z), 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/USLD91778398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0200f2893fa600689af77a23456f1d0b95d4d7a2e4719c2fc2b1c32bf9a837. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:02:27Z), 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/USLD91778401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c93fa4ae6c46aac5089a9db603e2f191a6f44e51febda57f95ee8b856ba8d2c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/USLD91778403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d6a2a05e84b1208f55b89193ac12725efa13ee73c7d9f1b21188cc6762517b. 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/QZS642185351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd75a7fc75828ad9d2c69f006d8eceb82f6ae68f0b0d42b2434316d20b0f91b1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZWFF2342029.
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