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 0xdd155dc6122dd0766410fc835d5ca03464a44ab7d885114eb82bf3b67de138f4. 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/98ac4b8a-9a2f-4e4f-a0de-ce9c7adce748.json and https://artists.proofprofile.net/proofs/artist/98ac4b8a-9a2f-4e4f-a0de-ce9c7adce748.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 0x846b1ee8ba8364c1dd9025d7694f5f4dcc3477329895883aa131a1653eb15b7f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DGA072194727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1432e124a30109e200d1ecff372f2dda4d4e8f89a9d2c07390bcf5bf7dc7b52. 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/DGA072194729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf291dd7749efd5d9caa3ec11b16312bdb2b417088b049033088312d9b637b37d. 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/DGA072194730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629e5f387dbb91986fddcc32d70f32cbcb10887d8811bd8cb455837a067d646a. 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/DGA072194731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898a5d3fe6c9bf3cb343a09fbf90aebfefdb3d89b00832705082dd47aef96f8. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DGA072194732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1290d2c9ae6a6e30fbcaab0a7637563705e606dfa4e21b8fa3369aa824ff2e9f. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DGA072194733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc27a1a8e47ef28cc640170c365b2c0786625f0501e7a5ce69aee26a5ae930d7. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DGA072194734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cb2fcfd5f158d4e88da6c1066c2022500e6a1a6bcadaf168e5825b52c3c229. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA072194735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09d90d021634a21b8a385db05dd8fa392c51d426e8923a51fe08e583bb573b. 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/DGA072194736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe733c6742d230a17bd8ee2fa3b2445899e49230ea5df3257f50b6621fc9de4. 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/DGA072194737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3f4d57c4e4334a78e8445c72f3be9eee8224c1389882b49498d5c47f159354. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DGA072194738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61998e52fdb1350bce420ea5795f1d17f5c9a77c4f2ae3bc27fe68cb3494c411. 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/DGA072194739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40477d81974511b64eb7d0f43e2e41cd20cf5c002c3e572ba3ba7708062b046. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA052236496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a78f73d447aca83ec88c9893182e408910836f6bdd069f50ee9b2f2a7f0fb2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA052236497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3db457d93b53d8caa27958aed97be7b59568e92a127b9d66db5201f6b7bda9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DGA052236498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f9a2e5e341096922532cfe5f1e6618277e400db4ef9ff2bf59e02b957861f0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DGA052236503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b82f8a3e9dbdfba6e5e77d4fea70f6c48071b668b435fb6d2a900e16359f78. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DGA052236506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615957e7d762b63a5353701e17f10e2cfee7478f596b04f1a7b8e838ad4b0591. 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/DGA052236510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97228d5541b8ed106a07aa9c1c282832dcc1b174cc8263bcc9d32b29c2f250f. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FR10S1990124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aad88242239b4a20b57bcab123728593b6fb772a3c4d2be832f973127212f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR10S1990126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c414721365106d2b84f7c5a1b928b629d16b74581665992693b83f59331cc88. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR10S1990127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7475b30b7634451318490f05dc482e969c8ec2c07835fcd2749480c2f4ab5017. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR10S1990130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857508d55b047c81e1fae58b9ad373918b67869ad5343ad1ea296e68b684935e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S1990131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53287f259e8305dd610b5ab04a2e56efc6d628c3ac9a3d80919c98610d2cabdf. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR10S1990132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b95f5c813b0f0d1b39924562ba7fed69facacf05b808188f7a296099bd85d63. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR10S1990133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5da42e7163816e04d4c41c8fb0510bcffe52fd7d8217ceaf051dd02c0ab1e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR59R2209339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ff7f217b0d7d53ef4b619126c98b0598a8a462c01a5dd7380dd0c7d9e29f6b. 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/DGA072232622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774c779bfaa9ae7ea248b031c6d2c023372b6bc069a37fad1fa87d4ae4c48c02. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA072233932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c76907d5f6609d0907bc251acce3b7ef568f0330860e10cb61bafaf28815707. 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/GRSTY2300617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480a26ea99d3f3d67b2341fd681a7abedd48ed830e7c4278eda05bedc96eac5a. 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/GRSTY2301208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34be491a9d316fe96896f1036bac63aae1ec10382df5f71664c18ddfbbc628f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GRSTY2401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd421de58d46ddadf17b11014adddc4b59400b846f115e294b27b132cb7eb1f74. 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/GRSTY2201547.