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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa176f66490fde59e65dc7563e2871130491046cd7cdf43e4fe32e39be76e988c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba60c467-3713-440e-ad3b-c29381a7fdbd.json and https://artists.proofprofile.net/proofs/artist/ba60c467-3713-440e-ad3b-c29381a7fdbd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892724be7fd31f69b37a36b8847181ba34687ae4d312e58d72307d8f58e1f84b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:17Z), 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/QZDA51885876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975cd35200cccf699f68e7f810228062412362b660fd8d4fbab0a48e3f651a1. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZDA51885877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8755cae2776d9f913f834e4d04adcbe1d4608a8f59e1a05dc68e804af5b20494. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA51885878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b614fd31460be6f25dd998fccb6a63f0c9d57822bdd6a95261ec5a078350d01. 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/QZDA51885879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d085cc1e493c091527d2a0b59c5cfb84adcc5928da65f5c8041505962e2c9a3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA51890049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20199228db69df30fa6492b88ac902bdde01c186046ffc92447cbce733e55098. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZES91805973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd581a2682e90ae12d8c871a41730843b91ac998ea05aec936cde8815f311e9. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZES91805975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98814e09ece9f9bba2647c1c65a9a5ac15b710adc5e03fc7c7ba6bd7c013b69b. 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/QZES91805978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528450c6f8e9df17e8ac312fc92d27f97ab852d2ca61f630b67d9e1b531de80a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYW1955879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4b0f0712160da0c82085f540aaad949dc6cb8ec915beb4de01d45975a16fe3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZFYW1955880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7fff7a808696fa12022aeca1864eeeecbe9fe77b013a17da733797887e19ee. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNWU2528308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca608ff8906e4debdd054cf93122ea4842257a8b48857362985ac073fc90d07. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNA1959584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e20fca1390b9f1c6215ab96be859aee5f6efb5908154a165bc5cff0c14059c. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZNWW2001677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87625ec438710ecf8a2a7dc3824f843e52fbb5d8f25ec9691a82d007e22e9dc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWW2001680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908cb76c4e7b3e902be589545bbb5325094cff673a8c959c84f347941974c332. 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/QZNWW2001683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5b806f7fe8ae16f2ecedff105b26a5b429613518b151c0d5a74bad8a122baf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:22Z), 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/QZHN72201698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848b306b1bd1a39668ef6f6de8cbd4daa3fae7b7037cf4f6be288a2f842bbe83. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:55Z), 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/QZHN72201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a78f9044fefaa1b1ac2ad0fd47df3379ffdb8491ac99a09aa66059f994eafa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBC2399009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9838381a4ab7f246f4d10714dd6aa56b550549892ac00727fb487c8761729e84. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBC2399010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405b35d8a24371456ce17e951d1f5c161d00ad968e4509cc3877638ac18f683d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTBC2399011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff6c148423afdeaef16c9b8b989f96fcbe39dd1fa737219404c683caf07b36c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:34Z), 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/QZTBC2399013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4a00fb65a91c343ccf6e15a4d0d72bf7a68164dbbbd46227eb6fc42dc783da. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:24Z), 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/QZTBC2399015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7f2c4a4656d7d284b87867df24e1bb4f129ff633e57a78b595d0650ebf1673. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBC2399016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98241284b24969f0a4891d4217ae43f5171154566bbbef2c5568976b5a27acc9. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTBC2399017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60bbb6d70ff75e2c4f8ae5ecbdede26ee7ec75ca7a108ff67832baebff8de0f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBC2399018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a9f200992b265ccc611f395f576ba28a06adf3a5e47d8d31e2273174b1443. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZWFJ2311840.