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 0xd032eb7d1aa5a096c4a3f619ad671dfe87f1e65f7e1b97ceac72a3b5cb3da9c7. 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/d52b08d4-a6e4-4656-8541-4e4124f40fa6.json and https://artists.proofprofile.net/proofs/artist/d52b08d4-a6e4-4656-8541-4e4124f40fa6.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 0xffcd0c5bb1c90af4e691253ffe0db25c3da5434dc0bee9fe884141c561df3dfd. 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/QZNWR2429822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb469a017d158f5fac6f3218d697f315effe97622ebfd2efdc715e8a5ada80e42. 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/QZNWR2429823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceb6979f6801f26b598dde55f6d1de24185dc64207f3feb2c9bdf833e662f78. 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/QZNWR2429824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ceab909bea6770e2e311ec3a8b14ddae388eeccd99284ae8c14b451a63aed. 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/GBKQU2469359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb184bb383574c885db477f9be443c226d01f01e7fc10ccd4895ae9c8e9f5d. 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/GBKQU2469360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb995f31fd0121b97ece95a0372e8122a8744a533e71c7e70d32b8b9171a1c7d. 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/GBKQU2469361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08df726630711128c3dbafe2c1d6aa047ce9261d2fae09779020601d99e9e47. 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/QZK6M2475467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f66f3e5bb398062f550c899bc2d09b1c6da8e49cda19cc6cb5598ae89c2d333. 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/QZK6M2475469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4901354eb3676a9f79d0e5f3a9eaf4d6f91710eb083b3651dc0cb87df16c6bc. 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/QZK6M2475471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0874df58ae08afdef009e0baa38266760bc99c3d0813d733bea97d46817e3695. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6M2475470.
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 0x1c0b97e9d12dfe9321aaaf10114703430f8d032e0f59eb33663c2e34116ddb1a. 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/QZK6K2494526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f41a31d45ba35c1ce058a98ed0df24dcf8f5ee2317d0f6f238c3b0586ae1278. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6K2494527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4247e07a5437a94b7f23736f4b94984a4868c82fe1fb273f371f49fa61328e7b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZFZ72491616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136c732628bb7a4d7514885c9e445f213110e5a05b0b34dc63ced38596a6af40. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZFZ72491617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e10adaceff2734e16ce0f46c77447c3b3bbcd2dc1fa580eb34fdebaeb5c50fb. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ72491618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1866e769e4ca18140c77a7be677f5be3be8f65599bbdb41c58aa79a1a82389dc. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZFZ72491619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaf7451618bd5db6ec168e03b9cc128104ba3c2eb4dccbd016047d06622e0e4. 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/QZWFH2322837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a84e2669ad8f38f5ec27a5a55a6376a6c04c93a084f826d96091ecf23ef13dc. 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/QZWFH2322838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c7510dce9c8c7babb526d0d6c4e73e5a768d8b6a14ed11095833bb28ebb81b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZWFH2322835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89fbe51a94378baffdbb9de6ca17524040f1c284ed2be6bd8a5e4e512fbb8be. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZWFH2322836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bd3419914b54047034db3045eb922df705a725968e0ac22782a33509543532. 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/QZTB22302874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4598a541f2e85b96f3d203215e040234769c01fc4285f6a17ad71a36754a2894. 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/QZTB22302875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746a2e4a7b8183c87a7d6d119d80b3dc09a9eb69347f033bbf5b32d0f1873b6d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTB22302876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf634cec38a966e4be003c7e89fe367a7581546429acc029145070fbed03c7c8b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZTB22302877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac90743bb1509f7df4c44c91452d9c710ddffbbd8cd2073ebb73f9dc465a9ad2. 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/GBKQU2480627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690bec52912448be0d1295fc0bcc3c5d1a2ef70043f4490c6445e806dca2a15a. 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/GBKQU2480629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2032504beb2dc5a0b4f87bbe80bf894f80bb2ef1635f8eba68d60da3c10fd2. 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/CA5KR2444115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52924a9276e70c1c304b0fa755cda2eeff7db30be6e66c5fe2fa8f2a20f1a97e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CA5KR2444119.