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 0xeb9b074501f9356992974370aed7dc6ff7feb64eb571a004215f865abf8f0953. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa4db7da-b12c-4100-b226-2d1cf8fd30a8.json and https://artists.proofprofile.net/proofs/artist/aa4db7da-b12c-4100-b226-2d1cf8fd30a8.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 0xf216b01c92b30487d5c59d5833eda01454380b133cbf00afef83a3fcef68847c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/PYC842401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54329db10172877230a1b6d6bfcd1fc613d05c67a235e2c4b561e3ce29763bf3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PYC842400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8256237fbb3304393d4d17d9fe3962994740305240f216269d90a4339614dd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22245145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7eda5552df799482a93d133817bda2c19e4f7a6feb06c0c9513993404880d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PYC842421223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d435122fa9795c07ec924e55f60025e3bc0a9b9e51529f34a36898f0d39638c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PYC842420487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78a2dcdb14a9df10cb32c201e8cd65e46623478ff93af17bbd45bd79e755e17. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PYC842500961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce889de057c7fe5bede49aebd88888903b27a3612803aec05066c856a7fde1c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PYC842500962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0563561bb64fd60a1b689dab18fd09c382a3e5e50974f20b7915777e73e62211. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PYC842409861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14404c78331e4ac6fe96cffa3a2faf93ce8cb43bd11a80669320396d9041da79. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PYC842500965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef51dc0bb2fe54b1ead2120a04acdd61cd98d42f88225b00bfc236bee5619e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PYC842300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661dee535f32be3e064543a7b826e3b997b36309ffbb7b3169a5df6d9eaf4245. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PYC842500968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f54200081de3e7486704e4fa1ff0ab63f050e304d5b42770d04f71b751981ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PYC842401898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89920648e4087caa4cbc70726ee5186054948adf8f3fe7b880ee3f594a1b7841. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PYC842301378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028a79c6dcaff0ab5dd646c0a34051d2bd063a3bd815e07b0dd93af1e5217a8c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PYC842301160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf571e2bd686c7d6b0ec68535a854c19a0a9fa052aa9969067b39a7d8ff3e28ba. 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/QZPLR2013653.