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 0xa73db493dd3cc125d3de39dbf9b7289604b03ba9b18906e839fda59b1b7e65f1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d94cc841-e786-453d-b7b2-6f0d2884986d.json and https://artists.proofprofile.net/proofs/artist/d94cc841-e786-453d-b7b2-6f0d2884986d.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 0x36c9aa53fd6143abbaf3cc6d8e1c757450d3ea4537c9a715965e9033682c28f5. 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/USHM81828612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd6896baffde623c6df82ddbf91ebd01ab356912a0b4f43bdcae726edb600f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:47Z), 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/USHM81828613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327aad2bbe37c59f9a6de5294c1d5899ab925c2c9c2daea628dbf63ce0d41c32. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USHM81828615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bb26d7862ab3c9010d7eb008d1fec027c220d0c1a3f9e53717f50fc4357c91. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM81828616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c99c8f67d789eccb5df3de9419c1039c57a1273b78a07fba81f11ebe185a250. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNJV2235332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179ff3d8366e8c1207280a99fd213e3eea9d8c2b90e4066168478df12f332f85. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJX2292939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89179c02576a792cbce47cb38398e4d7b1c613c1604c619c185459915eed8e2d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJX2292940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afb6d4397705689490a9853ed2574167c32c9c482ef46d4bc8e771eb1eedcff. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZW9K2215583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeffca9cf6573194449534f1581241b667c80bd7f2f11eb053fe11a6d399a580. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZW9K2215584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5dd13b033e0bf6d7e378286626911cb3ad3c8723288a505d4025e5ee7009b0. 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/QZW9K2215585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c18fdbda3c6ddb5a01d0fc45534f04b9659997aa8bdbaa935113db4f6179e16. 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/QZW9K2215587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466a9051115803b4804a3775f7d6ca835f346ccb6a8f9031e245f8f2ccca8efd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZW9K2215588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7890c6b08a096fa6f9bdfd1a8cb9a9bbd9e8a07a9bc5037b5fdcba68b5cc6763. 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/QZW9K2215594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8051e782fde9be27880c00da69ebb91e3bcbabdca688474a3ecb51bb3469c8. 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/QZNJY2521648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2454a3a43d32e4afd716ae115c2eacfe91ee1f9ba50d8f8807f262dee73deb7e. 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/QZNJY2521649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb029042f90bb66e5e7ed3da58560475a5314872de4d959d79dbce56075c45c55. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNJY2521650.