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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd177b40646c2e11ec895b3efabdde946fb05fddb1d794e6503409cbfd1890f14. 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/0cb15f58-89f8-4d21-a680-519ac4b246fb.json and https://artists.proofprofile.net/proofs/artist/0cb15f58-89f8-4d21-a680-519ac4b246fb.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2afd86256914885a15df6e1414f3e24330b63b34ad1e1d6148fcff696c285d. 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/USUM72018291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc291ee49f89ae8bcd221b999953c59d04a167928b3642777bd3479f4046620. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USUM72105220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc291ee49f89ae8bcd221b999953c59d04a167928b3642777bd3479f4046620. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:09Z), 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/USUM72105220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4916a608b527a54363a534f142cb97a0f943e6f639c079ae8e286ced4cad64. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USUM72107538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3124180018e3c7b4afcb1b8efb8ce6f49f341718e97dea1bae1e8e23a4e9916f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:26Z), 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/USUM72107421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4418ac4470d171d662365fce376425f4e3b81000ceb8a02293c3a613b6cc089. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USUM72112372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c60cc2c9cca08fc6fe1ed9116632a359758d3c0fd32c8575cffcafbc1360a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USUM72203101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc41102556b36d33512e6c015529badec72e013d30c2419e08abe85cb5195528. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/USUM72211838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ebdd3eeaf836c8ce4f0c846f10751ed0f9498262b749c4119fcf398d2f5f37. 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/USUM72100998.