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 0x781630ab5266042843cafee016c572e682fd0e71620a21ef12c3541404e3fc7f. 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/fc5825aa-e437-419a-8319-910df436079a.json and https://artists.proofprofile.net/proofs/artist/fc5825aa-e437-419a-8319-910df436079a.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 0x37306e8e53faea3a7d9617afd09d64f10c00486afe29c00124f542797294b474. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/UKGNX1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9c112fdb7341b7a5a8a436747af8d31662a98ae4cc2e99eb25f89823de3fa5. 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/UKGNX1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5a516ff9826ca758463d870da702922d60e96fb24f6f4956713703ae1af7c8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKGNX1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0201d51c2a404cdeb53de15b2a79031aeef0fc4ff221e8563856181d6772cb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKGNX1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d771b83503e2cc57899f8200c218b85d81991a66f7008832d304dcb5ac404d7. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/UKGNX1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808ed005150594d47eb1fca03fbc095e6e507c10ef403f7875d9bd6107995e8c. 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/UKGNX1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a121b5311dfcc77a7b196e41c8d080a123e9e960eee1819248410393fc8ce8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKGNX1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fed58aefe97aa64299d3308481afc5875868e4ba522fe8b22e1c5b4a852e7c. 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/QZES61979604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a7a8d007d60425f691cc2f84b7c896cf69baa7d199e62dd1e187dd45611fc3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZES61979606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68268404d20197a930accb32d6c1f58aea5190bc9caf5ecddaae3518a7be3c4d. 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/QZES61979608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3535ce2d70bba4b01816d7c00cdabbb02998be53d78ddf399e466f422f939408. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZFZ72033880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49760f0e126e0a740ded013546b5eb25baa11fd85f6eb7cf04d777faf1154761. 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/QZMER2033214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c9a34371c52e297e52ec7656c7e0c6882b6037c6f50c1d1b0425000bc9cc3e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES52157321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1b662bb84a8c0ce19c3458d4d525db993d0de1e38e754307d1fb98058cb01f. 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/QZHN52137979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbe66897b05b23759a018a425eb68a1601a948199d7c8069df6fbb99a652e73. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHNA2157877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd279c3a1c3c0f95df61e5d13dd5b1cc9b83374475fc75ec7846215ec2698fcd2. 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/QZHNA2157878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf858ded63ab6b4dc44cbd431276f1460f0e22c641f8027142e511bb951c28630. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKTE42300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dc909702a4943e1851e0e6b3f698faac8a910beaea189200df00b58b2aab93. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/UKTE42300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38459ef52db49676c8bce8416a20b16d854489a3cfe3a5b8876e5f9507f1ca7. 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/UKTE42300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e09386805d157af849aa717c584a22092795ce15fd3e70aa785b904f03d712. 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/UKTE42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0082cafa2f2c78829b4199ddb58b7b96271f450335bc2c138c10340762d5511. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/UKTE42300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a53ce5ad9de7cebc217f44c189ce4026c99027ffd2a0250f99de1c5a8b15c1. 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/UKTE42300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd93881b39a488641514b2e1c637a1b111edf54b0b83d8def883e838c9407d7. 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/GBPVV2504060.