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 0xc7f8c1914284ebd9913494c83fd4a0876749a615f38140e80414aa83238ef7da. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac6927ac-ea70-4458-8b99-ae3d8355d452.json and https://artists.proofprofile.net/proofs/artist/ac6927ac-ea70-4458-8b99-ae3d8355d452.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
National Anthem of the Republics, Vol. 1
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 0x6bdc285d75f3b8f6d659eaf3fe486bf9400435d78dfb30df0afccd69e9ba854c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZK6K2235328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269bb111e23f8120733f1abbd74ece5173a2cf4fad7c7442fbc3b130e72caa4c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZK6K2235334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2230a2acc655d54c1c271a4d6f332928a8d32651699f996efb41580fa81180. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZK6K2235335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7f477b21f260893f52a0511b0ad9e23e7503e3e16bfe877f70e1579a97c7cb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZK6K2235336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad37887425bbb34605abb0f8d764086f842d6d85f2507b9d87c365b782c48f1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTRX2106763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0cd8faa946205baaf43e339f13bdfb6b0581e75ebaa503a1f47d1c6c6ee7c4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTRX2106765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec7cfaf8a64502aa9e7399d9373e6cf9edb678db5de0420ee2c33861001e97. 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/QZTRX2106768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74881cf5801c7baf51c228ac94de1c223a5cdcba4d914d6d12322bee9190af58. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTRX2106769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb98a4d0763f76b41fc233ad7f6c109a00a27d4517d141f0b333fbdb4ac7fc9f. 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/GBWUL2192623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2815457f0d0a042c032339c96da9a82506e0d0332e82a4ac9ae0d815847fbf12. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBWUL2190700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c931412bc36c7d010b0b04572efaea83cc03d123872936f8a0778a80be7650. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBWUL2149131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbe4403dfd0c18ef017d1d054a57e9df3c75d9dec7e7740ec18aca1422cf6a0. 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/UKEX32124309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4992b1637a6c60652517c1d74640dc582f35f900431b9f12aab5b484fac9e0. 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/QZHN72460409.