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 0x9a5ace26ee81521b0e94fab8f224841056a9a7573a4c309c6ffbb48d89c8d9ee. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6873e501-bc96-4316-95ea-cd8f049bd5be.json and https://artists.proofprofile.net/proofs/artist/6873e501-bc96-4316-95ea-cd8f049bd5be.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 0x6a2af26c10fb32eda673594d3564ed215f82049e89283e27fb1fa817d1dc6120. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HUA612400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7635a9fdb5b3783e7ae8d427dc7e5ae1e034af70c34704d25fca095303dbf578. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA612400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f14b1b3305f74d8b23935cb26509e0b3a273f7d628b46989156206febb70420. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA612400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1e32df3e999142eabec3ce0fd560071690c3df6251e7fd2f97ef2f868ff747. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HUA612400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258561e5be40e838347ea59a4d45f9d116ee116c4af70fe0a4d4f1c386f0cd4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA612400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41305a6cea12230178476e9f4fdd215cce73561799afd9585cc9be1031db0ed6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA611702518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc6370c209488934802fd53a0d1ad5368b88957397de0e355cb4e10133611fc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUA611702520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc14b99925985c89ad8babcc04ff6f2ad6835513164d6b73da40459aa4132f4a. 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/HUA611702522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee1a26bf3729dc04d1b677e8443471f7bc26c421effa585a4af7c6fdfb3e940. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HUA611400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38863e3578c9416dc41d31648f8ca31a8dfb30e96e998937e729a99a51e3abf2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HUA611400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf410a9b3aa4bfb26f47a80757a8c7d1f34a63e27d72372cf9962837dfdc6070e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/HUA611400349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc636af50261cf86fd239557c3f846ada95f7b42fbdcd1ff366271d8b895f1399. 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/HUA611400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf642ac7e9d802ca23cc6b6b5ef179607843fe27fca35f1aa59fae582f58e66. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HUA612103103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b50c57b84ad263e3c5c32cd731ca06ff1936081688e1a98a9ced1e4c2918b4. 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/HUA612103108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef2ecae812d3b2509fc6d121661a13789cc5b9079b8f5e8b23266d6d6e2113e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA612103115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59174d263ec6e9173154aa00f5a66413ac7e4b8aaab430e8d6b53b95f38b6dd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HUA612403374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9993959fd329965e3356ecefa3d4f53ce32384f5da5ffe22164c1af4d231f1a9. 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/HUA612403375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700f6f52d11133fc614c13c9c2c69cdd6aa7e14696b81321a35af3a47ada068d. 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/HUA612403378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96221978a4a532253617ab9b2cad1d4c722aea088725506b9789dfaa30b3e3c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUA612403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d02ace4d739cff02f5f99acb2f825383769703d5874a1892d1da0343e1d1ca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HUA612403380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a05335ef4bed038e7b94b5c3a19d3bde2011532bb935bf06f953b76688bcb9f. 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/HUC301500799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a72b254e8fd8fb047f4401801546409615266496a01ff6518379856cc4cb55. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HUC301500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fd378b9dc4b21aecfc43350329c159a1b99c8e036d465dc65dec6e75ead7e8. 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/HUC591500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd557b8e2d8291f0711ee784e273d6d2a551e905e86a0a224347b59dbe0e544f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUC591500033.