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 0x449fe0c7eb49708e993ebe8aa9759e29afd8ba1e3f97b68adc9f9a780be0d62a. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c113a239-0987-4a3c-9d51-3297b1304f86.json and https://artists.proofprofile.net/proofs/artist/c113a239-0987-4a3c-9d51-3297b1304f86.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 0x1811fbf6a795841dc6f460a4c130c658757500fa2c814bea52637b1fad6fc031. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR6V80307736.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34886cd452334e47acb27583f3f74dbd8dcb1a5c9c51586de45d01d7925108d. 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/CH6541887194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428aa452b2d9a86010eb1ba06f06b42c8a38e9a8f8d9897950353b97108dae7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/CH6541887197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3bce8984b43a2ea44f40b5471caf08a7c51869921a87ad9ec815eb7e1ceca4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CH6541887199.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265b3fbc01f1cccf91e2d34920debc4e332eafb5ea2b544ea425073a3c1a2e04. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CH6541887203.
Les titres essentiels celtiques (Celtic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05553da49efba01602f1d202b9e86ae21b9ec22d8f948d3fa09795b7c34e75e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR6V80302017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b893aec737db7eafb72c9ec7541ef8237c7253b1a2dc9943cd669cf645043f. 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/FR6V80302001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332226ca25eef9f26d849c893af2302be5b439e34aa2a951a5f0af8732abf670. 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/FR6V80302003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c21ee4ae24627ee1ef3885fe4853b7a5d76f4f5d1a793e3c332cbfabe4a300. 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/FR6V80302004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2032c0345b759c5d03ab52e597afc585c254d009fd4b91c0cedd117342153e4. 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/FR6V80302021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa39b39fad770aa8e1d9a992eedd62fc9afe4327b095daad9485de36188c567d. 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/FR6V80302005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc6dfb0322ef02573705b12973e3ab5ae8f253e073b90e6d1d0ef534d294fb4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR6V80302006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20228a5e268cdc6dbdf646f98d8c7d83e0adc0d3cf5e9a99d215ebccc957a63c. 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/FR6V80302023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3eef714c3c896949896f61452c52427cab7aace2e95df4da8c59570bbb12c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V80302012.
Brian's Boru March / Sporting Paddy / The Traveller
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7290518139efbb52865c8765f017775e7c039f923d789846d29afc77aa025040. 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/FR6V80302016.