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 0x1be562714e1978e636c50ad59cfca919d0fd0706fc502ae95408197afc13abb0. 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/bc435889-d729-409f-8158-68b5f80e98e3.json and https://artists.proofprofile.net/proofs/artist/bc435889-d729-409f-8158-68b5f80e98e3.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 0xab418db9fb0d6e303742d6a78cc727f3a51111634823592b834ba710df54a29b. 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/QZHN52341716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904dcebfe429732e0a1e1207c3d0970ae2b0253a3c360fbc65f8b487dd5382e. 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/QZHN52341723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb48d311eb228b4a8d709ed9e6849f3f7bd7f8aa66df62af1b59e9ea31eb04bf. 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/QZHN91924962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cf2f3e6e1a7a9fdfe54cab1be8cff1a572b2552db7cc3849b59b3be24c7334. 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/QZHN61935833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548f8943a7cf7a719456006a78e6f7ae810dc6cad6e0fdcb579e28ed1b8e958e. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZHN91924964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e0f9737c845a1239133e8a0d2e5f353811448b88b8669b0a6f556f2782008e. 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/QZHN91924965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67defeb7d36a24fbddc141ba829007691e499d1948237ff592aed1ca153739d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN91924966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea96bb1f5627b61bbfb953a4d1bdf83b6151868e72f56752fb197c4357fb82. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHN91924963.
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 0x88b155cf936c9e200a013f02e5c05f7288605b0771612fcecead58cefa415551. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZHN91924967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee8360c4e34609cfa263b0f7d642b0beda0eaa96e34a9f3ca624472f32c5ac4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN91924968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312f05ebda0befda8d589fa3295806006692b25807d6640e70e43c24e0361f8f. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZHN91924969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca91ff5a122b3393897d5c8840571d8204d862f1d89edc791a501a3924a46161. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZHN91924970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e81d23e15940645f6ee1f3eda977f6d36dd3ba807070f4787a817d6400e09b. 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/QZFYW2130023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcc101eb9b1aef13b6614b4c01b71950e963eaa46e634fffa2da7b85ffefcb5. 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/QZDA82142848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58d2ce8cb82be7be6e0cf7b5025196beba1cea4c03975a8a4c184c6ddca8076. 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/QZDA82142850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649c847e65a7028b1b590d2a62334e709b2848aef08b8f8d19559f161e14ef7a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA82142855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132ef0d0e5aa4cdf05ad53318c8df8a93e74c901351f589d7b856f71f3fdc0dd. 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/QZDA82142857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fce759a72819684ec9be9869f521caa2f77192964494712733bc73b34b7f8bd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZDA82142847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecd8d1ea6424dff82e34ef5143fd6e255e820fd604420dade669fa50585d59f. 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/QZDA82142849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4df99fe6106a25dae9d7e878074147e927021933cdf573f433f8776303ebb68. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZDA82142851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2fd35bd959875c329613988383d225216613bcb3eda0b2d911491f4bfc69aa. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZDA82142854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce6aa72585941de5f2e8f11a1ba51ce31e197bbf21669ba37aa732ceaeb2238. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDA82142858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2655bdf8de1396061c0ccc71ced41269508c1a6bad93f28c18cb88dc7f072ddb. 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/QZNWR2115823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4007d82e53386b6c4063309aeaf95ef3b264a9d9a73d61d750c4e2c58dc68f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWS2199919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b81a449fbfbf468172ea1a3780084fa85d6cb2399a317ad173f1a0b8b8e15ba. 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/QZK6K2390626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd552153ab1f0934e55a2aa92d6a7d1e746303cb03d5454ce7d547e074ca1034a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTBD2357228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec5dccab9f3d87099da979a47dc612fd08ad05372cbccb180319a4b4922f05f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ72498805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d8de1038cbfbec7c1f72833a6d8b1bfa2e71706248bbf48fc28239e41f3673. 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/QZRP52481299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedf68d97af25606cc5f42e09e878d90fadcda0b97d9c189719eb0d14bdc765e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:22:59Z), 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/QZWFF2468372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cc4d079f474862f61e8c42cda29f5e98a0df749266c6b265e0a1c6ae5b3b71. 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/QZDA72576537.