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 0x5d5c7b964251eac986b6184aaff5336643dfcfdcd7bb7690a85791dca6ece873. 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/50d5c5b9-5882-45a4-8dcb-7781df737240.json and https://artists.proofprofile.net/proofs/artist/50d5c5b9-5882-45a4-8dcb-7781df737240.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 0x02df944114434e03db84201459f33b739c14c7db943457abc86c6ff52afa9ec9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ZA4PM2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa521e71f2561126f6abe1a5e996ba66868d6a8d34fba5bf8d7864ff195842e55. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZA4PM2100373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca7aaaf47eddc27c4657cf65d58d377e9d637607c449c4a4ba84160686eecc5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ZA4PM2100374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387c2f325dcd15f5bfffc26224383fe26bae78782861877414b85e2bff2a29c4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ZA4PM2100375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccb024aed3663e8bd56d9abef0b403c433e75b0cc53de0b3619914f47d57908. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA4PM2200544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c012069053cc71658c9c36b2ffb4faa38b514075e88328315ba25cdf24798. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZA4PM2200546.
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 0x2af778af291161996194d35dd2690c02b61cc6882211ac54c00e454fea28bdcf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAQ652302689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a619628b9313976fab61596d53f3f629ceeeaaad4928cbab4fdffeb3e58484. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:48:21Z), 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/ZA4PM2300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5e3a0dbaef0b38e92ddd58fba923818bf66fe5dd2a208df1b5b4f7bcbbdc66. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAC012400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cddf1d09386fbf1afcb56ed151be691e71cd66fd126b3725c34848a2d8f635. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZAC012401802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf53daeac2d339feaa1c1ca2f97138e2de3c85b6973e9260a1d16106b1aedccb. 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/ZAC012500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa610590d2fa23af3e006d9a1211baf217d6463e67f17bae268f489c54b152142. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAC012500846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939c8e883adace5d2cd0a483dbd4960fe952897e7091ed25cf3c8756b993c2f7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:07:50Z), 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/ZAC012500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b44e31cc778993ee51254168be7d15a3e267abaada185da038bb75b3bc74b4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAC012500997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4cee7e4159a69c02078f1a3848a301f8bd2080e0680c1696a02f5a6311e3aa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZAC012501200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268e596430eb421d99c86579e80fab92fef4a2ca548b66fa29fbd71d2535954. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA4PM2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68741fcf0dee8be9085d59162dccf03cc08e1ce39d8a8f755f654a6405092772. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA4PM2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268e596430eb421d99c86579e80fab92fef4a2ca548b66fa29fbd71d2535954. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZA4PM2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9bcdd2efbf9f6dda968c7d7b3c842a638ac6df4050c4536f02d788e3f8dea4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZA4PM2100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68741fcf0dee8be9085d59162dccf03cc08e1ce39d8a8f755f654a6405092772. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZA4PM2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31acb77c04893f0c54807e1be0cf13c1f75c97780d35e55b37b6a9df4db4afc. 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/ZA4PM2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268e596430eb421d99c86579e80fab92fef4a2ca548b66fa29fbd71d2535954. 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/ZA4PM2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bdc196555fedd8116d30b3d33355c376f2cc07165b31c52a7007d8b7a4c46a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES52002404.