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 0x1d53a92389b9d163559367ed84b0d3fc6a2c75e28b47985d51df1a24e1f6a49d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdf600eb-73d7-4e5b-a347-a54d893d3fb8.json and https://artists.proofprofile.net/proofs/artist/fdf600eb-73d7-4e5b-a347-a54d893d3fb8.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 0x85b59708b54a403c6be01f9d6e72a587a12a063bb02199f14f681701debec0ea. 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/FIARA1200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b38b773a2a06b3d43a98a77787b4b8408c5a408150d2131db460afd2c21aa1. 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/FI9TU1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee61e287036f2ac3e67258388967ac63e2e9e1bedfd9731a27b1a8f23aa79a7e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:48:32Z), 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/FIEMX2500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee61e287036f2ac3e67258388967ac63e2e9e1bedfd9731a27b1a8f23aa79a7e. 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/FIEMX2500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cda552a5ea139a0a211e72109042bc7517b383510975855f5f2e8acccb6c36f. 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/FIEMX2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9c80feb8560e7edf88f0589bd6a4815e999559e55c89284a61ebc9ed7c73bf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FIEMX2500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bc0a45009f6d62c0ddf8a6540298017b19bf44453de90943005b9ee382574f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FIEMX2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e4ad6fa36b167de2ccb1b9eb603657b71e3034a05dd76ca774000919a1ee2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:00:30Z), 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/FIEMX2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f0777b9767be1e6ae972139a54b9a9e2932e87fb43d1db983635c6a82f9b74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FIEMX2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8e426b02acc3412a419338544b0923127ba0d10c71eff72621f1db96b29e6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FIEMX2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b6e0ef8a4cdc9f882338dba205a701039c8716e0d4b9ba4dd5798360ca5f86. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:01:22Z), 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/FIEMX2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbb468de92e40439201eb1754bd9c237e822198ac4fb0df093b37792c7dd331. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:46:03Z), 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/FIEMX2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3addc6098cdcb5a049583f020da183e43ba6b7a2fa4bb46515b699c69f56d3e. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/FIEMX2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218e60c1b2bb4956dad80e9d4792364903f7190110cd00652916dfae9062eeb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FI9TU1500129.
Kajaanista Memphisiin - Sooloura 1978-2010
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c523bb0445e0cbbaa28a4e0f8c1ec3861192178032f15bdbf162ac4b3b9365. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FIHHR0900001.
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