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 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 0x5e205847ba2e8500f5abb492cbdae0ffff0506ce8f0d056f978d2a329298fa47. 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/e19a8e96-5155-49ed-ba9a-d321069b6b69.json and https://artists.proofprofile.net/proofs/artist/e19a8e96-5155-49ed-ba9a-d321069b6b69.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 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 0xd6443b74f81813631c16502ea767e8f95312fbcc5c9cc25ca189d26dd59e904a. 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/HUA791300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16b5eddb70dee931f2e799db362806f55eee610417168254ccba0272748c28. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/HUC591500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfed1b5fb90059fc77d80994540b6e55fe92ef2b2e987f2b3f75eac92f93f5f3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HUC591500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8914e020a6d3ee5bd3a9df640c82dcc2032095f63e938fb0ff4706373963052f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/HUC591500045.
Iszom A Feleségem Urára! (Arra A Mujára)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa27510c1c200ac156206802f93e997dc124c7ae3b29f6fa0c037fa51fa77f9c. 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/HUC591400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920e5c860517185a826f954ae06c110499de36ea24757d4dfebfc46c5263eab. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/HUC591400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fd378b9dc4b21aecfc43350329c159a1b99c8e036d465dc65dec6e75ead7e8. 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/HUC591500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3746379c89c2a0a691d4c8b16a69addff04c2d55dc87503bbd13b6cccf371e5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HUC591500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb4360a272791f5e41278e8c77ab5338d5674a6f0710b2f01c5cf0fa1c71240. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/HUC591600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ba2d6e22d46538a0c7c4984d250e04a0ca4b5fbf6e3834c3de03568544e209. 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/HUC591700329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846921fece3d5f45c89891edcd44b6061f2a127f77a360809ae62ce53710a0cb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:07Z), 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/HUC591700333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6139c61881ff48a8301f6ce2475c0e322987bfb9ada0a69732bf8b8a28d0f3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HUC591700334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8db6b8c7b2952b54a9124122b3392888c877c6894895698a5095e18c866b441. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/HUC592000139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6fcfbe13e7733ef9e434ea917d3fc07ff40ff425b33a17ec167d280289458a. 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/HUC592000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b45dfa3c5e0496f16e2c60e2f7c868903fa396465eb810e5d0300a5c5783ec5. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T00:59:31Z), 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/HUC592300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbacdcfd60adba174968de67cf445443a57d8438c28b76e4bf86cdad7c70ff52. 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/HUC592400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37644258e691845ce2816f396f93e0266f67a0bc997b08deb1cfed0fe591d63. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/HUC592400091.