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 0xb11fe95164e109948c58238c4ee5292497827d75f31d4dba388001a34d360678. 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/6c9c5452-beb9-4219-8466-a4ed10363c18.json and https://artists.proofprofile.net/proofs/artist/6c9c5452-beb9-4219-8466-a4ed10363c18.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 0x1dbc8df0ee82ff553a01b7eca19a7a7355f80727c2e7d092a5ba1ca72c53dc72. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US9GM2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2df7d57c4b7d0a4a0b7439f38001368eccef75f0a88ffd2ee6f07a5483a8f28. 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/US9GM2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dc770b542f9cbf95215ee5c6ac34a1d09aab06b9aeb77e015ce2256d54e358. 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/US9GM2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c0099c8d97cbeb7aa34d0b18f5bcd4e754d53fdb0f2cd487ae3178dc834ea. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUXN22328012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4c54717e9b1200901ee30d95d2efa498d03632076feb2c5b0d709a75e4a3e3. 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/GBKQU2362844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eb7e4a73961dd6952fade1fdd042e6ef3e7e853423bd669684ecd2111426de. 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/DEPI82313614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cb4634d95cb33c4bfba6314866b5ac546663ba9467a0989b5259750148e12c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEH742325834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dae0ff56a82cb5079c0b6488c660316334de8c0ffc9ee7ce0cf3fdff2090ae9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEH742325835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfe1ca074b21dfb2dbf84392ff117b3964ea5a0150fd5ac291e40f7814b0f75. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/UKACT2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40340d17b08c3be800966171dc3074af2160b8e4eb1bcda2148a45f02d78dbc. 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/GBKQU2426031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf881bf6c3509c4d6b051bd33fc4b2df75b9af68f1e1747e145ec2e07c37d851b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEH742409513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd98bcf771b90af1d22efd2e5ba4d1cb16a12a6a460a53be825851dfa245a4e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEH742409514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0446353a531cdbc79d84065a5edf80076662cfcab6309e93add8f0e652d5be71. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEH742409515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2dae089712d8319d4a6ce79529b016600cf3102df1212b28110e9cee654168. 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/UKR6V2410684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef99c4b352d4e51c64901debd834e18db73ca6c38d4457ef57640e49ae87abdf. 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/DEH742438811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf053c780973dc83e7b78158bceb936886f073c2ea38ad40985e8bf315ec1f5c2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEH742438812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff306a909e1fa8113217eb2f83d4f91a585bb64c0d69f607992b33d70b912c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEH742434087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a98c38da22ce7f6eff2665f368b3ece89eef22567eb49ce47bebe544b34d5f. 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/NLF712502057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b918b7e635d59e18e59a244410dca5e3cf8549b702e2eddde2747d9739ef84. 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/DEH742519197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf87bcae7cb9ab8c3f1f2c27ccd2d02fc059049dc4c50c192a3da1ff412d89. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GBKQU2582471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee80b310e26c0e85ca6b22d230c9e306beb8b85f6f74ee6d1282705c3b39488c. 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/GBKQU2345110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70af1ac60c92e23b4311c06a0c8ad321430f3b9d4cc9f737458f997d3b1535f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLML62300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f755a71f652ef0286f1b46c0ea1fe436858c0a04c7c2466208b07ab4c624641. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLML62300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae3b87a34f704a36742c091b2d57ed3692cc22477eec88d4d0bf1c7a665178f. 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/GRLP12332351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde93dbfb9271a04202c9883dc6d9d4f39affaae4611be507a1784e1895dcadb0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GRLP12332352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2f3391b64abea89c6602eab33fd6f8b4e85448fc0e066cfe486f1357c77d4e. 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/GBKQU2452165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd353f3c709217ab9d7d874b4d53b492276dfd001b57f7cc7e87da2619ea89db. 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/CA5KR2388238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5199d1804bed7011b91122e979bd970076752fa6e8924a21d273c06b18e73d. 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/CA5KR2388239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4c54717e9b1200901ee30d95d2efa498d03632076feb2c5b0d709a75e4a3e3. 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/GBKQU2362844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb463a07601d2bbf238a82293f926b46c6e8246e481c68d46ff6188c3d477b516. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEH742311711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ef392df6484ffaddb39e91e85f361ac5f9a2d336c5c5d1b65bf9c3cd16d690. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US9GM2300124.