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 0x0613961db9238aac41cf583e3046d4aca850a5245360ec2d77941461e5460b6b. 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/35370b70-5e6d-4e0c-91f1-553ecbdc728f.json and https://artists.proofprofile.net/proofs/artist/35370b70-5e6d-4e0c-91f1-553ecbdc728f.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 0x943358f42b85a5c4e8b93ad52ed1efc86c83b34c789b90f8b1a9bdb5e630b595. 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/DEUM72110417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb4f0c1da7cdcb5b6819a72801e3ff604ae13a5473bed35b14c47e59f818fa5. 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/DEUM72116122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005ead4e510305b322e37ea0264a0bcc7386870b73a6458158f98890550a7936. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEUM72117093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b13975e7686a88cfa71d72ca4118fbb2ffd7009f5dc266a8d2703a79b19412. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:33Z), 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/DEUM72117295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb689784b6e8a0ceca8a5ada15e16858e1c159bee74f3caf058ae5af1b21d96a7. 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/DEUM72202118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c5e9bb32132c1e88cef5b95c7f0f5041c9a22a30a60fdc7427fd2b3e390af5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEUM72307369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc231a9cf0483336d22bcd6b0d9a29ef3949e4bdbfd7642f4747395b08fea6693. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/DEUM72403786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aaf89861e691a6ce7941b9e6865125365865b5cc844258ec868a0507760cc3. 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/DEUM72402394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc0370eb9625f90c7559e028ec28ae077243fd752675d85e5a8daa9b8ccd07d. 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/DEUM72303203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee3bccb6ab1f0d88273c5b7d77af6d6b7d51c934eea2bc606aafdc01a68fb6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:05:43Z), 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/DEUM72408522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aaf89861e691a6ce7941b9e6865125365865b5cc844258ec868a0507760cc3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:11:04Z), 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/DEUM72402394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efa3be14c0066525b4fd209bfd361a5e4b5e043a2018075b9d91d5305ebdb55. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHR12345726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aaf89861e691a6ce7941b9e6865125365865b5cc844258ec868a0507760cc3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEUM72402394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aaf89861e691a6ce7941b9e6865125365865b5cc844258ec868a0507760cc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUM72402394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04445ab3c816d73603370cf6616082a6cdfecd9afac3a402fed71d64e05975ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUM72304623.