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 0x33f8cfe7ef95dbf198428d258af952866b3a1b9cd32ab2bbf26d1c362e042fda. 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/a75f58f4-07d9-4c62-831c-3fcf58432b85.json and https://artists.proofprofile.net/proofs/artist/a75f58f4-07d9-4c62-831c-3fcf58432b85.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 0x246f2bf276472a6728506d1e26bac191251ffd5417a698e9f5639c13074f8254. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:43Z), 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/TWAN71270448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7097c5691b7f186c2252591abddc24378fe61b086e183e6e0298d03eddb280. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:00Z), 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/TWAN71270450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3d91d222b97dc640debbb8c4e556cb25daf94705b6233d544d17705fa599d7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TWAN71270451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b0d89d8b2b2e41708a3fcdecf9c739d347e132406c38e164b69cf8ed8605f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:45:09Z), 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/TWAN71270454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a03956e2b06df1e7070cf8a2f7f7b2cba84c11053e4dab3755dc75447e27bea. 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/TWAN78060373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53b00a9d7ab27c44cdffdc3730d7475a1642c6036c25a84693d0f396539c0fb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TWAN78060374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc4719549ed2fcbd424f13e67e658f3b096dd29f0db67b06bc42bec585e345b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:30:29Z), 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/TWAN78060375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057064c01bf3cd3d68ab465e22f22e0ce2177e83ba4e40410180e95fe1b4e2b8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TWAN78060383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc0c768072d873b21250c095c17213f68dc447094c590b76cc1e033d7523776. 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/TWAN78060397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10752fafd36fb2dd499000ea8d915277813d2e336f69307e0510b5a34a627f68. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TWAN78060398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf46b58f8147b42dab0b0a26c6fc7b57e4fcd6e2f4eaa47fbe7ae52d3d854624. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TWAN78060399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20441251b8108ea47e69fc1d50b80455e8091df2f9a6b10b9467a635338ce330. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:51Z), 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/TWAN78060401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a74532cd13cd74239e38fdd990096e0798817ced08a6685983fe315b2a0cef. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TWAN78060402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe295c02ddf00774fa8208efe3afd02c543137ced81ec2408b33bc04f8e482536. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TWAN78060403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442288bf76b7f2e7fdeb3c26bb9a8abb2844bd42df677b3d0bdf8f60f3555e80. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TWAN78060404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968cf48ea3f00b644d869ab371965d9b8e3bc39a453d61f5f5b0831dbeccc4a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:51Z), 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/TWAN78060406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd973b45dbb14b347f14f6a8da66031c6e122dddc747411401a069e868ef6922f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:06:52Z), 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/TWAN78060407.