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 0x5573efb5e634a51f0941405c5adaa1f313541babdae9347ea7b0247be85c982e. 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/dce33f1d-5e96-48d2-a522-8eea40274334.json and https://artists.proofprofile.net/proofs/artist/dce33f1d-5e96-48d2-a522-8eea40274334.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 0xffb1041a0efdf056cc77c49e37eb90317a7b5a21da6fe01f1a4e8f0b605c95a0. 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/ARJUY2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6363385324355bcdd35a6ded91991ec5b2ef79cf6e3aa86e18d5baea79e377e1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ARJUY2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe15fc47fcae756c12c3ed3e3863700f2c77ca712706d05c7e0f17dd9605faf8. 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/ARHXW2103878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e007fd4f147f58337a39febe7cae2addcd0ce0526e465e444981f513fd4bb5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARJUY2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86a12c16f475ec82022e131cb70fd2a9fcbe318e6fe34df4b421007a432c3d5. 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/ARJUY2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffbf1ba10d5cfb7d3cb838b0e8c3a4ef344b20fcfc1cafc7fe9909c6d4425c4. 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/ARJUY2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06402e36b5ba3b87481788cf698eba35ec0c2706e4d6318be258179d7e3a7474. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/ARJUY2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f23ded924e34495e449d29cdf09a0b4c7aaa70343a07a68951e350f435c75e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ARJUY2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108401ea61cf86a01b043f28900590cd8ed5141f9f29a7dc0d2ba573f41d871c. 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/ARJUY2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3334e33643143077048c720e4c714a83fe8dc898a89d4ad49dd5976f05df4416. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARJUY2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb316d6ce847076de2ff9e1ff62b52a0b37f3dae5e49610ececa586351c600a99. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ARJUY2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe516b53f3da83981a988e1cd877cba9d620c0ece32fc72c65fb47dd4b8b72570. 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/ARJUY2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20222b5cf387b24d0ed665ddfbb1a4f4a43b19fb861c0c196b4e5f85cf75a4c6. 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/ARJUY2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b84da30b3bcb0bc70d3c14c69a32da0ca90ae55603a0f2df36ab776f3501163. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARJUY2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1393cd9e679591049aef0cee4d89046d2afcec709f94e274b9f53223744ca27. 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/ARJUY2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e52b8d64f4fbb8ed7137f73e2ba637fb9e0369189aeb59fe51a4923681c10. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ARJUY2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c116f89ec3fc227f7578830452b76655ad558c92ed24c55c5553fa528eacb5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ARJUY2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcdd4302e59c7d2cd53989a2d1b0c9a7537fa2580e6e54a7b4917f1469fce92. 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/ARJUY2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645727ff7c91728a9bc8706e9dec2d3a1e485ceef081753c9950390d2cd75b3a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ARJUY2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7872a07bd98fc2d562eb155d4efdfdf65f08f1b6ae04e0a80a8c419de396c3d2. 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/ARJUY2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2518617f6a3fee37e85f5d30fb954a0c86252be5306437247e4e979dab403c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARJUY2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31413b43ba53ad1b6ba6cff5b4e58f1654c4faee24e87de95c5fa936fa51274. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ARJUY2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced0c381fa75a5ad29e7df8db829ce6578cd8d968ab656e346588e7d1fd33ee7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARJUY2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e6c21892763534dd13ed641c8a699e942d9f1c841082a6e909d1ec35fba917. 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/ARJUY2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c4be5b3f55f992d4e6a5493781730d664b911f9ae655a34441bbcea7f4bdf9. 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/ARJUY2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f75cf665b29d6945145e18e3f254975e9ea43d13998cc82d4c2666c2c083f1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ARJUY2500020.