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 0xe8ab39395d927114944a8c7d3437bcb7db162bcf748fabf211ac4e5fab10bcf3. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d84965aa-e51b-459a-b347-07dbd1b28ef7.json and https://artists.proofprofile.net/proofs/artist/d84965aa-e51b-459a-b347-07dbd1b28ef7.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 0xb7cf53a3c0a42bc084ed3de884a77c598afa8f0ea4273a490ced21d362942425. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BRVWS2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a9ede35d2ab1a3c522f1b5bef21ce2089ecb455a6cf4ef22c3c13be74e1dd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRVWS2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202bd28bd726bd09af72a1a6554ce58ccead69b55e572db306636fecc31a542a. 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/BRVWS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30310099f4dc9af7c1e878fc6e6fd0ba02bb5e449912f7c33c7892962b0794c7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRVWS2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04549b3a5c1ba181f898d4f8dd25d52f1332510f184e2d306ed59c33b1fe334e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRVWS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6dc65a706cdaac8887a1a60563a53860b0a393b31a4ef25fa86350665ba79a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRVWS2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25064b33ea390912b87ec707d761c9fb457d15c8e088ae70c4955336233de07b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRVWS2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17251c3074673536ada89bc44d36a835f2cec2b3095e5129944a8dfedcfd73fd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRVWS2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d14136e17a4ae17b081c96da213ac9eb6fbcc5dd49e83105a1fa0ee64fe2a. 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/BRVWS2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ccdcfdf186c53848b6c372fa4c68049c19d522363b21647c793509b032ba5e. 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/BRVWS2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb32b4192b785ad6386d5bff89f27c660edc4163cffd1cbc02eea0aeab0f55c. 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/BRVWS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23135f75f6a35d3bbf1a3b32d5d6c52d1106ab750e80f59aa9f99f1ccc32dfe. 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/BRVWS2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0960b899e2e54819e1e54fb9eceecd7bdcbea0c4d3deed6f82c8fa1d05e26a. 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/BRVWS2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec39041e09a2b79298bdf1aa4f8f184dbfe594820ba914ab36e6e29033d4b2d9. 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/BRVWS2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269c32603843009b2f95e265bea67f19b5964c8ca9643f0d54af9d48fe21930f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRVWS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc292d1eba6ed5b6e45e19b74438010be4f1b5240fe59a5dca2d4e971ef7ee. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/BRVWS2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc064e2067d2bab337c5aa6e2cb0a42ed0b5f9905b96de27bfeac659855bde26. 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/BRVWS2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861eddc689c1ac2f6ec77b23311c67789c98b7393ff39f84d8c87c514c14a2cf. 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/BRVWS2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996f07c6bb82b6f4214503168da6cae02f6bc6319a67b923e7e83f679c093f5a. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BRVWS2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757b8ec23884e799476748ea949c05da6814cd31f3f874158af7084dad776540. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRVWS2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff86326f9f49c0d467ae6171419768e9a6e5b5a52ba176b0c208edfc017fa93e. 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/BRVWS2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e57702450b9a4f7e93e80a9317179280675dfeb0879961c5b07f3307c4b2da. 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/BRVWS2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bdaccd66897256c0412e705872a14a8864cde4069542275aaeb8e92dbaaf25. 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/BRVWS2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314c15055ef82d8791901a9cfeba2779b5012a40f5520ff0ed76b4d3625d5050. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRVWS2100003.