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 0xe5d785c228e52a8fd50674e0fdf6823a2dcb11da1ef9fd72ce635c274f8fa034. 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/0af6eb1c-ad25-41eb-a687-7411c66ccbf9.json and https://artists.proofprofile.net/proofs/artist/0af6eb1c-ad25-41eb-a687-7411c66ccbf9.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 0xf8a2c1e892dbf3e775f4f67523bfb4942bdd277765f635666b4b35299009f3a5. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:17Z), 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/TCAIZ2463316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802260436bce1392365a3f581acec2e3ac961d50a2c16639478a8ce6e554c1c7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:25:49Z), 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/TCAJA2420908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd1eddd83aae1f6fb012982f4a2db7ccb3bb152b1474790f99eef7740a8348f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJC2441427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76edb8bfb6c056c6f79c52282facd68bebbf3914f2ab7825262fb501ff55669c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:51:20Z), 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/TCAJB2448668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604dc7624f54fd1adc6aa243f8aa6e811a245becc90d0e9a6f6c11588c1ae24. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAJA2469593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b2360ff8d8a25a91a0be9943c228278669be96625d115ae9b33f6b017a812c. 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/TCAJA2488797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e0a2f25ce56b9d0d4aebdfad15521ccb2fd63f4fe70c5b3c3d5fae9c12c89. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAJB2441281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75378e5840e5d204b95fbc17f1afe4d0ef5a00cc50d3c05d9bd371cb69713d10. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:59Z), 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/TCAJB2472578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051d04b22beddf04b283412b2b18e4d75a95274f57b7fe1730cd40734b9d3f56. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJC2407612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b018eab6c682516809856190f34f5a585b157ee178c3425a5f526d3a87204d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJC2407610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577367569fd3d50e88d928c472b785b4177c90389067a9611020fc513290f3dd. 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/TCAJC2472707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ba16accafb6bfe6af01dbb42362c092eb0b85add4397811380f27d25cc2c5e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJC2472643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bb5ca978301a6ddc035ea218af16cc3679553ae9d878daa798f01a4b8e29b9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJD2419289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8589f042719c613ef52304525f4dbde9ac48c802fbc4f2702108e017557e33. 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/TCAJD2598348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036ec029e54d62c45093ac044f4a3d1f9cd501fe29f55147dadd84f9a35e1dbd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJD2598362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4b0e20be59cf3a00c4da5b00d31d8ca7cae4f56d0d35d95b4ffae4afcdb5e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJE2554631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a6f95ddf4b1a19339056a5ba4377a5094aff9362d704543c4529f863ded000. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJE2554572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd0980a120b8a0fddade6dae48cfc73fe4e8659f1981107748d891cbd41d1e6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJE2595566.