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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5690d6c1f9647feae72437591935933796901c82877edce3272740acb15e0f1c. 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/9170d7ad-0ed4-4571-8ffc-856e808e99bd.json and https://artists.proofprofile.net/proofs/artist/9170d7ad-0ed4-4571-8ffc-856e808e99bd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3aa4898a5176b9808c4f2b80e2208e9dec931c47ee8eb5989c8f0afd9e22c3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UK2RY1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111c15679c5c6791985fa84a04dd3d336138ac19a5200de5447b4ecbbd37c1f1. 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/UK2RY2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295b6386eb9b9ffe34542ada9d79a291f72370d5225b872e39e7529389b35fbf. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/UK2RY2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61dff2475bff390a43a3e8190277bfea9556ec54a6108241dc99db57132bf24. 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/UK2RY2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243591a3517d463727d99c7f72c7af908995b2a1d2110cc6bdff6152bf300c44. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UK2RY2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c50013bdc4e257f503aadd512fd026b2208219913d864c847c074b6c1c91f32. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/UK2RY2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec122801d3cba9434569c0b3656e1064bf6d346df478bbfe74d9507406c4cd. 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/UK2RY2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93319f08f9aaaf28b9e9997a7332c96d3dbf59d076904d90ac16beb63d508fe. 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/UK2RY2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc712bef77891d3abcaf2dbd0a88f4f94bf923849ad105914a2c13f67ccab4712. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/UK2RY2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb620c35b92b8d0f92ea2a55791616ca61ec5e863d1847770a572118703eef3b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/UK2RY2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4334821daacbb096d1f34c6e600da69f3244610227113f2db1ec8ca8f11cf3f. 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/UK2RY2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc79db0cd9439ba86e59ed5ba32b9b763d247360adaaca5e568e8685d84feabc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/UK2RY2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738b581e13aae814278add5b45f91f725d9b2cd5ab47bea90d1b899820371c2f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/UK2RY2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe4a332822a8512d4dc0c9eb330dd6601f805807591ba47a98e4317ae3d9032. 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/UK2RY2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc046c7a24c8a9d443849b17a015b280dc84ae807ecda7d961eaacab64023a798. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/UK2RY2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5a61f050a682cbe172b7f5ee26c9c51d1fbe7e95727b0d4c2dc6db4f1075ae. 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/UK2RY2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f3b405ad7371299f232fe9b451bb09c789511369f5e29aa81b8ac6f05ece7e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UK2RY2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba9129b1d7424ee94b20807ef0bfb1274e18f4e09a1f50d95e79186877abfeb. 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/QZNJX2429653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16b5355bf156d8150e184d54db49685b6f12e60f08f0bdeaee441c76d365f1b. 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/GBEWA2106680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec9c50aa5ba5700cf2c4530baaf7d5c9bbfdfe1ad4d7b54606e4ea019df34eb. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBEWA2106681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb837f66c845ece87854fd1f4c05115686b97b7b355e9663ce4ac750d3f91f5. 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/GBEWA1802070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de39b24da1175ec485eb2948c780e5435f7710d8c23770b63eda25c48faf0bd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBEWA1802071.
Indie / Pop / Folk Compilation: September 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec122801d3cba9434569c0b3656e1064bf6d346df478bbfe74d9507406c4cd. 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/UK2RY2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e376b9bcf15d7290ffd11feae1a765a9e0080d5e6dd9c80db7b74887aa40e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKPGJ2200067.