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 0xd5ec716cb7738c4ecc90f908b8370012756a7f59567589c3a3412a971f7f108c. 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/df796186-4f18-4012-9b04-4fe312cc0ccb.json and https://artists.proofprofile.net/proofs/artist/df796186-4f18-4012-9b04-4fe312cc0ccb.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 0x3d20ad0e31853d207c082b2ab3403248ac24a9f5a469930cc382270c07184284. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ES71G1714191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47be6bcf83877ff7f06d63b4ab2b0b32d2a26e3c31dc22827274dc658fca48d4. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES71G1714216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce26e65d9a99194566b82a738b6305cd92b3a68009350f6bc2e932e657efdea. 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/ES71G1714217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63f438c4eec992de9d5849631f8fd7533ba130571e4008d4d00195b84efcb28. 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/ES71G1714218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a51f759503792aad1e8bc65404253a834c860d994e66c2eb2d1a59ee50c38d7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES71G1714219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8540639f2202ba2b6cc30b3a6ab5ac3243451015bf811d385e5b4d40a4f4d67. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ES71G1714220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1ba64e8f80d3295686ed573d60c2f9befbfe4ee62625c9f552e7f90e855e93. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G1714221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5c5551a4b45215e470975dd2c3b6632c06c0c9d21289927fb779e232195af5. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/ES71G1714222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05b6b78d009e4e058fce03ae89b156af964e3a57d579bf44334fa45e849e443. 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/ES71G1714224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ac261ffd545d0860f37d4f6f9db031935a258058267e2dc8c8d37b0d91479e. 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/ES71G1714225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df63c61b5aced400883438c756f397f1de9c7b77ecbd669832fdac28532c208. 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/ES71G1714226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef43392457bb4f90af25e439a4efbe95491393486fba37d7d1ba12ad2021e48. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES6081540201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dddad376e988e4034c73a342ce439106bfac31e111f2e227ba8216d27f2c393. 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/ES6081540202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775e25d2256dc858ad848d8d39c3dbb1e763a9904d520651e024674ecfc58372. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ES6081540203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe452de43f24cd18b17a6b9638da9818881a3119f6e7d36bfce883e2d31bc248e. 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/ES6081540204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab722dec8ce8dfcac4a0647daf4b7da1afa8ad516fa4030685c5f1d0d4400d49. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES6081540205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa591f4962093886c7c4d49c909ba0a188bb32508f7987a61aff1934febfcd4a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081540206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1184e0b55b79ca09e6d5858e379423fe6d8ad78443a77270ebb9977d8b24e2d2. 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/ES6081540207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca4f3d6756d9e04996ce3a210c6d8fae031d24149a22158106a537f2ff1431a. 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/ES6081540208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f5f0624829b22ec39c3162fd7e2306d4fe3b1ba372b2da7b952d2e9015eb2. 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/ES6081540209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eab650c930140daaedea34260fdedc252a416f71fb768c28df779d8cb7c7c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES6081540210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc001baa4851fc74fd9857e54996d5c579c17fa7f82c2031550de68c513cae93b. 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/ES6081540211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8a7132148c439ffd89c5c1fa014593d1d8877f6742012a68e62c353a6c55a4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES6081540212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7674db6d3d4fa1c99367b86a3047cc9b2b0f67b2e138473bc67c67fc4490220e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/ES6081540213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bfb5a568ed08cab4cdc1d3b738ae1861aec91c0fab129dcfebbb670c88f09d. 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/ES6081540214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee192fa5b2264b487f5f7995eb1fc51fc8228fa61b67d6aba23d056125b04cf5. 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/ES6081540215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55e9eec254c72f1be81ad06bcb1b09d835680f01403e056591a499a834fd6fb. 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/ES6081540216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038ffbf75d923e8d3ebf5853eb467c38b5400960b4869890592845f5af3ed7a8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ES6081740303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bbcf6f1d92a06b283383b925e56f73724851b10fce5f7e6669f4d7ef1e9695. 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/ES6081740305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732f89f329e876a3eb3128d8a9194befd2a68d976d3385edc7d828a17f03e88e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ES6081740306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd3c4ec0bd98db20721a537da0ba9d398a86c540c4617e979686f4c1b886abc. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ES71G2151951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd3c4ec0bd98db20721a537da0ba9d398a86c540c4617e979686f4c1b886abc. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/ES71G2151951.