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 0x7c7387c405082a8d6157f39567d33bfe4f0e4af50cc3219d6154c9e17e3f7fba. 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/3d31eb56-885d-4668-a16d-5bd0c563c5e6.json and https://artists.proofprofile.net/proofs/artist/3d31eb56-885d-4668-a16d-5bd0c563c5e6.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 0x9bb698b4d7646b0bada4a13d3e79f4f8336fab6dee33c0df6e6b4644bc2a21f3. 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/QZDA61837087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fe83eaa1416e7fff9a0cff8c45e1e1ef8a04c47a26b9dc26093b51d6836da3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA41906165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864331be19698609d3d9e40df3eafc04493c331f67ad3f0034f0ae699b89b0fa. 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/QZDA41906166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be66ef76328bd0d0817056e89d9ebc51e2a95b773d6b67147c459cd17a53623. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN41969517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52b809adfb0b823cf18f8c5bff4c2153062171fbfc78f10d35fddfad12861fc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN41969522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60764e97b217127a3af80f7af469ba4aeafa4b62383eb58338c9e66cebdec63e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFZ32071203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4fdf92a92bcecdd3c58811754478453c458bc88a454eda3644d6732f262f6. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZFZ32071199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437bd1aa2e14b1c76c555eaa0186f04820549fabe40c2ce07a977524e344074. 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/QZFZ32071205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42ea624b266bfdfb76fcf846715c27fd7d5a5888b6b9d9f1e517bc07fe2a029. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ62113470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534154e10cf32e30a8c03a59e355f15146e296cdd3002bdef3c362aeb4a3335. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMEM2154729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe265c6df780f1736aef21feaefd4fc9935a21111746dfcd48700bd08a11d3603. 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/QZFZ42255272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e743bb5beebc1fc0eeb94d2389b78ff253623f62744f4402199519e6a3ddca. 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/QZES62216205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b839d6b0b0d8985e48d26d3ddaadd6fa285c61106a8692ca836efdcbc97877. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAU2240285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead2cf60c8a1b71ae75d3c6160eb2ea141d021078f98798772bae345974f46b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZAKB2430123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ca6508beb5353324a189db942410d732a7f41408e979e35090b2789de7928. 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/QZAKB2441361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead2cf60c8a1b71ae75d3c6160eb2ea141d021078f98798772bae345974f46b. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZAKB2430123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb52ec75609a7383da14048381baac1b1fab73bf2999e9a4f7708e1260d5a08. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZAKB2432013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c5fb3901ebc701343d3bd5a323e0d198858d9c3d3705ba600f6da7efee4fd2. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZAKB2432010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a0f50b41e04dee56817fce8b5d1a0b6cfaa7e99861701aff8404f05532f466. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZAKB2432011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d942523f8bbabd71d402a0ed10696765d84cd71b9603f95b190f1b0d7317b5. 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/FR59R2265784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091115721781cd0ea0d013752f119b3ed9a32fae153973b08d2b7fecc6e9321e. 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/FR59R2265780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4f96dcbf32950e92678c032a75358b02f360fcdd5c6722f64453564e6999ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVEM2315742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d942523f8bbabd71d402a0ed10696765d84cd71b9603f95b190f1b0d7317b5. 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/FR59R2265784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3fed94359f2b3db5d457dfc253d5785de8120dfe8b079ab0da81cce3bf5c5a. 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/FRX872134617.