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 0xf6a63926036a251adad8460f07e33b487989206f7b061bf781c08b3d86767131. 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/dd45a335-2932-43c1-904b-f612c85406e5.json and https://artists.proofprofile.net/proofs/artist/dd45a335-2932-43c1-904b-f612c85406e5.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 0xadc078d4bce37c027f85351afcf6576bf1c618512e2c0a19a125810d26d35483. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:25:09Z), 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/BRCID7700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb54dc8584576d8f8a3a8606df9b1af694d418900a2aaef3e00a4844d709218. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BRCID7700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0c9eb015da9e88de66dcb5dc100c299e1dadfc7826e32b69e443db4153e6af. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BRCID7700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a0f3a96e9d7c05e16b31cc88da7ba4c72959ce59549ed86b684f8eccc10593. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BRIMU1700906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e971802fbdcdd44141acef26f566dfac28be0bff3b7d59d400036453b7923b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:09Z), 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/BRIMU1700907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219798e0e1078ac8832459abac6d4298a48528b25b106e3c9c8ec94f58354365. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/BRIMU1700912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a60b5b0c73bf262eccd3054d27e618940744ab5948a71db7c70917a733b67. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:18Z), 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/BRIMU1700915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaf0d16138dd823f3c4b4aa2a6153d917b6518d5996dab2cac12573626826e3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BRIMU1700917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065eab79d8618142becc2617000ce553d8d30ba83c42251ab88f9f89cbb18ce9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRACT1000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efd8ac60d67a8508d0d828c69de28267090e3c42077998a0bfb141a52d0971e. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/BRACT1000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a0261cc2dd00830be7ce9f0d6c5a0e3d78a1fa37ffe5dac6d62d1521537523. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:57:41Z), 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/BRACT1000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1a27de01efc66204b677cd3d6c1cb6884d563b2128e45b90e9cc8f94aefaf2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRACT1000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b11d6ff33135be0fe64b8b94bdda85de9254b1c96e7d78c3280a291f8710c. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/BRACT0701137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c311215a39e57d46098af1017e1d671456769d32a717d303196175555bf14. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:27Z), 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/BRACT0701138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1475c33455b060391dd0494ed0d98600750d3e95ddadfe15509d89d1078e8d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/BRACT0701139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfcb72374021b732ab38b6c7a65014efb9d23dba612bda03d0123d5d05797f1. 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/BRACT0701140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a170bb4b92347c18cb37242c0ee3af5974be84e3c7a459b0d271c7fed2d26. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRACT0701142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe661862d76715be5ff2fcef0b5339f2ee371f20e300acd0526d546c4741fff1. 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/BRACT0701076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428f114b45f6fe241da63c419b4269c07601bdf3d0e28f4b38559c08d0eaa930. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BRACT0701080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d4d6025a89d07efb8478cd185a440b00271af2004d173512e80cbcc3663eb5. 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/BRACT1605878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e84bff99acdad736aa6ec400e7247f0356b6c5fe646a3897074466e076b445f. 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/BRACT1605879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5d6ba24414fada0f7a6c188329aadda97077abd735669b4d6cae8d54eb3ba5. 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/BRACT1605881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b1e96594a502121cc3700126fc8e8c88bd92b1971f750914aeb39b66225a8. 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/BRACT1605882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e3cb01867869b70c49ae8468b40022afcd1a8b462d08452ac7cd675da0af7. 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/BRACT1605883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7bad6c3f084f873583dd3c1b14c7052404867f8ceae056d3bf2e30b7b21fe7. 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/BRACT1605886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1416889eae4368faf37ea3b4064d1c94596532876286f28ec18ec7a8e466aea2. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/BRACT1605887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638abd7a6cf1a8b77d0710f932891371bcbb34a5aabc1b99b7417d27775c754. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/BRACT1605888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cfe7abbf05066e9a42017879d90ff8e0e58ad88f7bab480d18674fc7ba232c. 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/BRACT1605890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd856220b601085ceb265c2cf30f45e22d049d0b87589e155c84a46d8e0af2e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BRACT0701886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90e4a6c7d10642139af0ea3926ad7b58f73aa6e3cdba5cb8641fb3fcbee2572. 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/BRACT0701889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1607b987890acecd8bf49a662ea0acc631f4209368c6ef81f3016613aa9947. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/BRACT0701891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a3528e153d0e8ffc23be1dc21b9f2bca9545ee80f9baf3996b38a3e6e860a4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BXQD91900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c41cc1c6360ff068eef9ef24b2a2f95cef520c8f250e96c6d4fd5399e1d92. 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/BRACT0600412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c25ea5e50c921c8028146b60ccc6a4b33560df08452db6527bc4357b5eb4753. 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/BRUSA0801234.