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 0x7736eb6336dd12aad7166a344a26cae5d13057b3bc53db512be378c5eb438c17. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b5608bf-706a-41ec-9d6e-9df4628696b5.json and https://artists.proofprofile.net/proofs/artist/3b5608bf-706a-41ec-9d6e-9df4628696b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arruzzenuta (comm'a corda e 'sta chitarra)
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 0xc3f21100c0e31486877093540ab1102ac2920b41e917073eb0b27c53cfa37e23. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAHM2369564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f21100c0e31486877093540ab1102ac2920b41e917073eb0b27c53cfa37e23. 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/TCAHM2369564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6158047cd091058f04c52ec2377fee20409dfab5f1d1f31ce751a4256c56694a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAHQ2334854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f28340f4277e459d3dcd7403d1055897fc0b8701190fa0bcfa98b6f86bf8d9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHS2392975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086648c0d5f1e66c1a5e57915241ae43dd9bd6141ef5b6d0c0722652a9412775. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAHU2471583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8250720322b3a0fef7adfb54b0913c246b16e6b47998ba994738e5e32b4cb028. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCAHU2471635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13e223b03743cf4f4477ef760da43021a16bd0e8c39666a00de8d43e7c6086. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/TCAHU2471688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0595eafce6855c0cab1fd1fbefaacf73e50ce7ff9a89e9ce95293a2f0f6419e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAIJ2496853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb414879f35f8e867d0f028c67b7500117ebddb88fac99d0b06d9f0ccd2ce75. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIO2468464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8306a06b4185ad5079726c5ad854aa1d290293267ef16956f8c441ded9857ae. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAIX2472989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff798067deb7751cf25d2cd42055029ca624d1f53319ed726b63d55d49039e4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIX2472995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf0267913c12f57a20e99d74431d4a2b9c5c1ddb21030c50c714e80b3470361. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAJC2414984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294097e33c30a44d805fb47b8f0b32fae9e0b83306b9f80d542c3ae14242be87. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAJG2542764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796b18a5a8612080ab9bd554ecb94bf5be685b21da207933fd4a040747f11559. 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/TCAJM2521698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63604f32f3659cb1c65d697d7f58c4b4e0764b107be1e71376664484a90da99. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJM2521730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f2ade0d5c4761204350e111c97413d1627587f2d8104b36e795c6ffec65df0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJM2521790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a97169e431e7519e600103ba94a992f8779e6ec8da0806cf1ceaa9cefb03c69. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJY2507428.