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 0x63b3f60f52077097d746a1998420e7c0a9abd6b0cf06309b721d760623169407. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/154472ff-4a52-4af1-b123-f040e07ce494.json and https://artists.proofprofile.net/proofs/artist/154472ff-4a52-4af1-b123-f040e07ce494.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 0xef5fbe3f0b7521a807f7554da7123945f461e7f308269ad6c7952b4337966b40. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAER2087003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ae229f8280a4a115838e347d10adb62f0190fe38e4114e773eeb5fe39b27e5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAER2087018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1831be7e0740de348b6fab552529a340fff6607984f29e9ff49d301ecf155f73. 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/TCAFM2146491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bebde1198485cedcfbbb055ee65600bb12aa09ac1388d31e7214c7f4a0572c9. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCADH1784456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9e2f00f5a3c7f71a5e833800a38257bb1d9ba8fcd602a0d446ab30e98445fe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEK1949535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507aef2d09c511f3bfb670f43e54ddb1fd53f048ede53c1b8ccb873ec34d9a7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFX2102283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e5aea8a2c8dee78a0a2f5bdf478bfc8cfa94c8f651afbbd732a244da009904. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:21Z), 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/TCAIL2448255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ab256adb76e7d5f63fe3cc8cf79e26ab59e9973c5e0c1f5c64384c1f5df81f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAIQ2443055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c51b939e46c0f738951429727541ca700ec49a1f463c8874a00a4e7aef525f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIP2443251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9394737031e24dbed142dabcc5010d67303d7c6a781782a1fbe3a389fa92f45c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAIQ2443085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e16369ce6ed39ec2dfccb30db4b939dc3b4e07c60d810617aa1d483b9f0aae. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIP2443100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cbd54136a5e0d34329c9b8674a6a7f60f479874de9b4ae2b3453b0f2ab32db. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAIQ2443107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945544f911ab95d76649823e1bc91d027cc9100ac6c4301d7802aa43b14d6584. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:15Z), 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/TCAIP2443116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6c07e6e2f4b53c5f847da0c5d0efbdcc6bc88311b10a8ce06d82b400d1cb8b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIQ2443141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158f895c8c94c3a04ac0cdb73d86d1a103457d607277ba3766b713328e823b29. 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/TCAIQ2443158.