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 0x2d5371ebc5735ba40dc7dbe73999f473ed3735f91d9eeb1ea6a87f8eddfe3381. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/202d6564-1ace-4231-8b09-8d017852caa3.json and https://artists.proofprofile.net/proofs/artist/202d6564-1ace-4231-8b09-8d017852caa3.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 0x9da1931284f688b55630e3519f47085cc444f40bc85f5b3186d3ba9a37935dfe. 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/QZWFT2431809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5eeeade20bebf9e29db24236560443e91064f8674ed975fef5f7a55379f9ba. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZFZ32563321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92ebfba4ee76c2ae28b7711917e4fba917935cd9fbeb27d720843a1a0179582. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ792490251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3029c2ff0ddf3d3670b70f391e45cc6cde3681ab2ff2c6b90b5a43aece616668. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN82578772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2272104b317472c62c11324c091c70c965e49c7f3a6b85ec5c402868dfcf4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6J2541397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf283e09f94bd55da9285c3f4250e19d71008ca8881e60c9d5ea9b34375bc7f9f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:33Z), 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/QZMEQ2525887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f8d984c09feaa1568b7304d6ced94d735ae10fdd82ae1353cc4766c9210e1d. 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/QZMER2593291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fc0353a76695ecbd77ed0529ec9a764fe13ddfe2ce6d897e498354a5402a15. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAU2529851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dab91116ce8daa5a1002f83ff149ff529d0aa77f381a8ad9df48402b2ff2ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:41Z), 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/QZTBE2536270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4233c0688179c58e6bbb55c707bb7912c3dd941b197981fb6b552e96b3d7f8. 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/QZWFK2584548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b0848c0f8941190aef73ffc6ee2953e24ff4cf09cd24c86667e055f68e9e8a. 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/QZWFW2591634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1f0ee979f6e935f08f4c40039af06c158625271e2dd32296fd49908523cb2c. 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/QZZ7L2590754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94910a4fd63a078595c95d5124514e07833c1fa527d26fbda3feb766f509cb38. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7L2590755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bc4be80cbee85335b32fee6b5a33caac7a7065635c88ce6858cbe2659d91ca. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZZ7S2594568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc75e1e35823b2d4fbef1d470a371b08fa5085ba138d752956ee731d23d4d7b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7W2547522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5978530f87c93c59ed7a63937fc7c7b876b16832396d46a4bd135fa50686a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F82531214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1f23601745e8b8fe51ee2fa100885210490dbcd19fd838c21afc45b7ead30. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:20:27Z), 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/QT6ET2515913.