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 0xf062fd04478674bf526297e5140ed151e7097650cd2898956a13a88bf3c598f7. 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/2dc28c74-b85f-43e8-80c7-7a0c90212ef0.json and https://artists.proofprofile.net/proofs/artist/2dc28c74-b85f-43e8-80c7-7a0c90212ef0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
One day the bird that follows me at night won't anymore
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 0x53317fedad03785c167218ada0dc2f3be3ca2a463cbfdbeb27aac3718cbb1b19. 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/USLZJ2184482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bff2c6c2d26933937d851371d61af44a8cee4cc617c438a9d77db4635232b78. 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/GBRKQ2198002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500a5460b17722b80b6b6387a1112c6e5d1d1c86a7e7d2862258db5bb45e7bdf. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GBRKQ2198012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f1530413ce04ec169ce8ac9705bdf77d7f08fc2de8211d5883ffbf9c57acab. 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/GBRKQ2198015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ece8700260b91bc1ab6948ecb52d13b1746c8ce594d6618750d3b9703e72ef. 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/GBRKQ2198016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c852419ab70d0f6da08b5675e237514049633036eb57732770475193f4232c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBRKQ2198020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde4d6bfb47088121f1be4dc149fa8aa97371b60ddcad93dc807b09df5d05d11. 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/QZ5FN2270243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd64a3dc41a11549f9aae31ed164aeeb4dcf3bf413a712a94cb70e75c44d0167. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZ5FN2270241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11060eb7ec86727dde53b877852f6a2933e00dbe045f9f95580a1c934e7452a5. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZNB82228904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8325410aae719be02dc6ce4e687c3eb880951734faa540573320a2fc6e59c5db. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNB82228906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a651e5a9177bfb397bcee29ce5cf2b49dc14776426772ab6fd6445832da30f. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZ5FN2339326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9560998e65cba47e581f7838f33f210c69f88a0cdc101db0c966cd22a66696dd. 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/QZNB82351414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa41756bfd2d18691e4b314a95c884a5ac6f3be612b840432cf121c0d60afac. 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/QZNB82351415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00baf3b53b87f5ea5bbcb7f371e14c0c14834026f5779f6d758ba7795a4891a. 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/QZNB82351417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc50f737ad73a8615ec9b324955c558892e495ce2af71665245facf6b6f99c6. 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/QZNB82351418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b9ec6d547d058d34a0cc61f33aab1a87d9a2472c66f3277418ffb1a36f346e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNB82351419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a03aebc78592a5a8d056c217ffa555c9e3ac12fbdd25c15282e381d2bfb76a. 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/QZNB82351420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb3526756f2ec2f3ab820e1bc3cdddcaea55d5b391952b0df5f8cd2af94a979. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5FN2253371.