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 0xd6bdfb916aeb669137e30ec5c73077b01ec883207ae194cc16a255854340a1d9. 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/da3d94d2-c9ad-4e5c-b392-24f238156683.json and https://artists.proofprofile.net/proofs/artist/da3d94d2-c9ad-4e5c-b392-24f238156683.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 0x402a9ba54845dfd681745683880543c00ed80cbc877f7cf3d0ba9151c3a4b79b. 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/QZTRX2361307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24e025a63a950a625a0bf8fe3c25ecce90afd21033836b8f9b98dfd18bbe9e. 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/QZTV32305331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be43ae1c7a1cc2e0a6e443f90a6a7d3d85f3ff2311601bffc305657f08b3c91. 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/QZTV32305332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e595cdc563dd2cbab6551e00f1ddf3df4e1675f1cf35533daaf9d4d0c20dc0. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZTV32305346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea8445f183596afe83957a67a8381844bcc2bd9847fb315e038239687bc6ac4. 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/QZWDD2375122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b366b785a7a965d000b5420e3a67bcb928da6d471fd3d95c7b0d17a3604fa0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USLZJ2470988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb44f334b222c7be004e655159eadd72412af514556773aa1210b9d02448edf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ISB112502001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4453489c07661980846f9c6f59ce3e2a1329c753a2f4b182238bc9788651a15b. 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/ISB112502002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f25cd0511e6d37e285193b9ffc0e7319239ff1c9e8943db33b73720eb9e5d8. 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/ISB112502003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b366b785a7a965d000b5420e3a67bcb928da6d471fd3d95c7b0d17a3604fa0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USLZJ2470988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106fbad163dbf76f41d6326a8a7fb2cfcfc146e7347e7218a47b714d1ad0ea6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ISB112502005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e70e29a27669fbf362336f71c4fe9f7ef0cc2a6e3fcb387529fe4a246715787. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ISB112502006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6153c1a41ad70e962c4c74f5cbaca0cdae7d6f5c86a0e9bf22640b37c039b1bf. 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/QZTV32449433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4829f2ad45610b901717d59b21693ee56cdbf27b7071e9a161242824183a9731. 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/ISB112502008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9039ed74b1480a458be8db5d8b5a7b43f38dc48cf8fa201258d82adff0f302d3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTRX2302181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f3e304fd7106434c36348cb5eb5943bbbf034518929165b63023b78b910c9f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ISV442420201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106fbad163dbf76f41d6326a8a7fb2cfcfc146e7347e7218a47b714d1ad0ea6. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/ISB112502005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e70e29a27669fbf362336f71c4fe9f7ef0cc2a6e3fcb387529fe4a246715787. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ISB112502006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4829f2ad45610b901717d59b21693ee56cdbf27b7071e9a161242824183a9731. 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/ISB112502008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4d6de00871f58c471bee0d2c2c1c71c93cc3ae11bafdfcb7d2dcbb39cc0fba. 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/ISB112502009.