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 0xd8fceb5496612a0cd42bfc69829076c1d43c85824f491f01ebb7b98594bb8cf3. 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/8e260d4d-3dfc-4722-a4ea-cbcf0c1557de.json and https://artists.proofprofile.net/proofs/artist/8e260d4d-3dfc-4722-a4ea-cbcf0c1557de.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 0x2b17299724af41dbb908988bf6affead89c02de313c5b2004d3e70a0d8584b2a. 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/QZK6G2274911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f7bac4dd6baab1112023ddc8b952265a49fb26d8612018856b77dd481c2732. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FIHYZ2400027.
Tarvii enää ketää (feat. Gionni & Kunta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa9e321e3adaeeeb0e3162c6087c60f89d4cfb8ce8685a6339238fb8c7bc4a7. 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/FIHYZ2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29deb8be8c2d7e2ea67f21e4d728da2397708b88f9ac42c61a5e48b1953debb2. 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/QZMER2380357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ff1a944ef139010900ff855641ff910e0f7eb98c0ce0c2d60f1513f9d66b24. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZES92396273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b17299724af41dbb908988bf6affead89c02de313c5b2004d3e70a0d8584b2a. 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/QZK6G2274911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe324a3f401e8b4b0d90b035dea5dbef993b2e48e488997449c248847eb3df960. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FIHYZ2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34d983ac052c20195dfcac627315b67f589914c88fc7539bce33e549d9c4639. 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/QZTB62264264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6562fdd0e4a009a22ba0744d3d3c8a6c7939cdd839ca4edae4c8f2f2e4aaf027. 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/QZWFJ2365619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9034e63c81010e39036a6e593a4d2a770d6b5ee3b7739f5981252bb647540. 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/FIHYZ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3c10b924c4cfdf6ea1a78070a8e0c29c79f29ab0a4b1d67e73cfb86c3a45c3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FIHYZ2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ca3696cce8495ed5f6b39fe043c1114368099023ac4d93aced5ca0c0a363e3. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FIHYZ2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8c4d76cd0af8cf0d5d185a6797c9a61b93e61fe1b1fa0ea349469e8ae81e2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIAJZ2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e02ac846e210bfcebd125c3873adc87adafff1d55c2c4c8ed115b101e8b0088. 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/QZHN92353567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d96b236065ed6fd3a73ed739f3797520a73d02ef6b72cd8701f374394e8669. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZES82139687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8c4d76cd0af8cf0d5d185a6797c9a61b93e61fe1b1fa0ea349469e8ae81e2. 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/FIAJZ2300017.