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 0xd27f47e18d700afe0d2bff622705551f8597aea8ce36bd9377afd2f13031c575. 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/a20a83aa-f895-4baf-9a56-c715ef97f65d.json and https://artists.proofprofile.net/proofs/artist/a20a83aa-f895-4baf-9a56-c715ef97f65d.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 0xfacb00920bb3ad876e4fd8407ec2adac083627ad720f00d8d75b9a57f4977b6b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA011635426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e0f0a872695ae2ccdad5d371bb6e0faaedf02ce6bcd15493b077e2f8cd9ba9. 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/QMFMG1540437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21bc544fcabf828fa13249aa22308048943dd44be9489433eb4648e0c9e3d16. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMG1540436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28333b92c0b6c729aba608a4c743e40516ec327d76b6587449d4cd91bb7818d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADX1847688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e5c3e6b0dc0e37ec91b5c73e116ee6b71e46f076209f5249f924855269fa9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA011635430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d48dcd131aa1e594400f7332e4e1fa4be51f6393294f80a60f18546c275344. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFMG1540434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79402d28a9bcf62f710f4a9a8a138bf09383dfaacf72d2cc8866d4c958aacede. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFMG1540433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910839513ecb25264ae431cefe2f84d198d088e5e513b478b8caae1f3be8d651. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMG1540432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed40598d549f1a4565797f048dc8f1ed13c196561cae7a02d11fb79b31fff2cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMG1540431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd760783e8c22a5c96cd736c0c2f990dbd2080e0b1c302ce5915955912ca8b74. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ESA011635435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa536e5ac781d2efc8cf776a83fc525b316366d278d44e5651971fbfad01455. 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/TCADX1847697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b319b8fdd45c761a345e40cf26fb59c2172093825a891d4559feb8f09091bb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMG1540427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469ea3bed27ad029181d1a22091f116bbc7159564d912766d478b61ebb325e29. 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/ESA011635439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9514b4d19e410138e55d2d6b0f21f00e493175b92129eab7b8269f79914193. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMG1540425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b047e490577c6f8fd66ffc860d622e3acb8255987d36cf7194a8ffd293a808. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QMFMG1540428.
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 0x524e2e5d218cf65d2715f7d8e1145695a0bad64f88843b24ef5d1ec586c593f4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCADX1863372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5a4073a25f9affb4f7e572e039aceda04d96f3243924b8998a04517e092841. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADX1863378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e99a677896caec44d97d4190483f7003da8f4839f162dd547b768c2da3d961. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCADX1863379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f00e75e28b59c883bc9dc7ffe17c3b4a141a0e2f8125950ea8b9d6668a1399d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:12Z), 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/TCADX1863381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe694f545fe6d66a201c0cc5efc492a965033d5b533dc474fdbd074e03f959fd1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCADX1863382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4133bc79f9dc3ada5f559cf16065679d3d9881d9dafcedb59b862745d20a2e91. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCADX1863386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb265b3dbd16b1834201fa4651e479cc17066d56b1a9509dae1de0a1f147d76e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:32Z), 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/AUGBT2432881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64d5baa1512e70e77b348376267146212d77a2c3a7203786866d2e5b2b82591. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/AUGBT2432900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1871a00cbf349cdba98b40de25bef24185f5fb79271f7aa9525e75a2fd08172f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ32008289.