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 0xf264016c93916c3da74c20767a2527be6b8022a9b43080b6a450c16a86cc2e8d. 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/4188df72-92f7-4053-ac89-fe3a7b76245f.json and https://artists.proofprofile.net/proofs/artist/4188df72-92f7-4053-ac89-fe3a7b76245f.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 0xc215fb1803bf0e3922881da1b074a964f6f3fc82606b48581b191701f6811147. 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/TCAFK2179367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c58ba9b194ea11a694bb191a817fb0c567cb128a3c0d361a76dc7c7204d6f. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/TCAGA2221606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b3a801948af84a90dfcfe36b0782bc5d8caa47cb17ee8573dd38e1c9d05199. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCAGA2221653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee04d6f4863a0d4f2b572afd183619d0958681b56e6c7a974108d43d21bdd77. 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/TCAGA2221657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61eb732531c7db7af5a73769d5c1f67785ee4834c2501c3850917e7b260ef04. 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/QZNW72356998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ba5436e8e63bfd7030aef2990dc29809edda0cf0d18729b025de55890de14d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ZAQ652300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dc6de8e229a8858852660f2d0f2a12d4ad2a94452970945985ad404094a41c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ESA012496009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093beaf74214e0a25803017d0c06565bc4b11480aeea581b9fa909f1a988d640. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ESA012496000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e9758c7fb2bd44c00a6d735de6501ace2448cc9d4996c6e2314ace42210213. 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/ESA012496016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a4e5f2d92b3a64e58a410ae4f2a8850ef0c6539ad7f9388c395bfe6f3f0978. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ESA012496003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daeedc63893d929c5f1354c82618863659d4f738c174961808d6a5b072305ad. 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/ESA012497794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760ff5db3dd2145c196553c5ce75ba7d37c4ef2b1e30005d52ad3252178650a3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ESA012497797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a97e9253fc7d7e55610c6bc855059a5b7c33dc79f5c206220cecce79c264fcd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ESA012497808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dfd015a8ef2e3fb0a1ed4892daad50f88648eb2678b4df9a36687b1bb50d97. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/ESA012497814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561979495a330ce42279b9ff024f6d01124cb470466c92fb88d93ef566fd6b17. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ESA012497850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20be3afe08d0c9278a525848d94317e530db1ebf30666a07efc59063dcdb48d1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ESA012497855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0eec872859ea67f7cb57d97a9a28eaf2f83c5f999ff78a33e560e68d29f8a97. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA012497868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca7630a763141adf629227c9db9663f64bbc65b22edb906b06db39c97088774. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/ESA012497871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeaee46dfa722cb4e256af0ba4409eac8ecef742beb5487be3ac311555f23e6. 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/ESA012497872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ddacc3420f159f19dea6e38dd139326e479c420f56a97b7f9b0a7f9d5dcf6c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/ESA012497776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac50a68a54d8447a76f75c4477e40d4f22be9bbe47d8ff6fad34f8a20f2e708. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ESA012497784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb270fc6c3a135981ab8cfca1162845003725f30599fdbe24413cd7d2f310b340. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA012497822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ca8a9d81d7e07d883cdb83245b2268f24bcb25add88a33b385039d0c6cc5ab. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA012544836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84da2a7b009238296562fa743f6320f95cb0180a359a554e3844c9aa2670c8bb. 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/TCAGS2202379.