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 0x00e48fc99267651ee8e34b5c59903622013c106f053fa3a3a467bffe2f6c43af. 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/54a487ef-b3ef-4f5e-871e-fc660c9c3bca.json and https://artists.proofprofile.net/proofs/artist/54a487ef-b3ef-4f5e-871e-fc660c9c3bca.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 0x16516b23b461d3b9d390ccc070fe22a3d9bfa7ae5a1e89f8c638b398e1f817ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR59R2146751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6c83507e187c9d8225b9f34f396dd5a45d2da46b924141881dffbcb51e9856. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRX452196905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878bb8712c4eaac73963c47b7d57a20a0cf81614ab61213d381aef37dbfab7c6. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/FR2X42289352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf469198d0f00b4136ea33905c118e2d454fbbf892bad541666f60e7c76deba2. 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/IDB842100175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0963f4b1fe55ec27286dd54d506c17cf476babfca6cf56877be76fce12cb8e8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDB842100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf30471d834c864a6bf6cd45cfd59cfb6ba605f9275bcc6e91931de3c80dc4e. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/IDB842100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe810e5513b5cec365f515aae112367a09a301dac326808ffaa76a9c99f803b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SGB502492618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c4bd1a085ddcc23692449b1f7d91b8db255df0c9a2759a6ce99847266c413b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SGB502540921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebebb1de219843aa62b0c48d2fe82107cfdc756ba0919c46a32b58077efd6885. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SGB502547692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3caabad5eeba1a6b6f551d09b724866a062792ec185690047b8aaa2d03cfad4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXBAV2590235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9290244219d22c73f0da46703b0bc08718c91f96706fd64ec5661571996793. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SGW502517544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7642673526a9e15486c7ea78ecef0b71df27fb576dd895933ff9e1a462bba1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SGW502593184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee9663f1c1d6baf18cb8e383e5d605c71eadf5f8e0ff169c8a6cb2635e1cac0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRX282509970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5f538fcca0b194f4279cb4016f3781d62c1630bb17684700e465422ec2af80. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/FRX282509969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bdbb969ff151ad6c6b374b6561497c84f44a789cc8b084ff9663af4863e72e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX282509519.