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 0x514f83922661691144f92ca3d4a58d9953cd97df9e225f646ac552c4b34f01a1. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/146235de-5a4d-4ab6-8d75-a49883bd465d.json and https://artists.proofprofile.net/proofs/artist/146235de-5a4d-4ab6-8d75-a49883bd465d.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 0x1642c00b8b082f6b8a1bc6d200edd6ebd449f91dc797acde17a1b34b18ae7056. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX872291874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d880a0eb35de915b2430d7254214eef0406e2aa20ff6b5c98edcba473454ce. 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/FRX872291876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b3748153900df71734c8b0dbfff8e920e588c436bf91dc7e86121d71f8b2d1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DGA062380586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f034255e4ee91946d5ab5e4db65b578db9225cba322200de1becabb17f03be. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FRX762474142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12745e70594efd372c4659aa59b39b814ecad46d377f3156c4f7696d5bb4ec80. 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/DGA0P2473929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8224f1a631e71d781d38754d6de879ea3d958f1f2bac3302bd95fa1d25248aba. 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/FR10S2524579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bc89ec60f7ec3e34cd173cc3bbaf3b8875536acb40b2a0eaefadbb1781d6cf. 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/FR10S2577144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35baa88cf895c77da79b4803bc91c61d9fa08b183baef6e36219cfa88b5282. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FR10S2570926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b3c4fdc91c3c4b088cc6b2809bc618be0cda376eaed5808358230625b5de97. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FR2X42596247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898829afadfeecae6c0c16ebfd31de71b2a6f9cf9ba570328e3f2fb19d284b76. 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/FR96X2534468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77efcdab61af756c1d67a2442a7f348ddcec19afb1b090a917e7e9f9feb99e3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FR96X2594021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6472292c3a4e1092e77963e9ee896bbbdde23cef54052f4e747bfb12df1639. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX282579422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982fd0137ec5fabfff5308bb80bfa9936fb8b77e187533faff638b3bff52f5e3. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/FRX452516118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0c9f3753dbefcae4d5c00310d2be06c24ef69339f69d4f5beb899239e85c68. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRX762506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae44b69e110b0d301f09ca509f3677bf86433ce495079e755f216b8a486ab2c. 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/FRX872578195.