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 0x28edd43657564ea71533051ad4e36b669327de2cc063bbc3ffb7e434ce01df07. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0774e074-46ef-4588-93f3-b9dea89fb16d.json and https://artists.proofprofile.net/proofs/artist/0774e074-46ef-4588-93f3-b9dea89fb16d.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 0x266b1e90e6c3b448d5ea4ef64cb6e02e685448ac12868b6c1ad0fda210d35617. 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/ZAY361600454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a275191e45c6085274b0c94bbae9b403d2a1223e2ed0bcfae5ca4793daefaa2. 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/ZAY361600382.
Amazulu - Durban's Finest vs Gukwa Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e608ab6b618d44e66e017a3b7849426ec837391fa4866211a5bbc903a987b5. 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/ZAB7A1600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdcded4b21255777dcd764712ac2826fb41cc72bf0440740eb5eecbaecf357f. 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/ZAY361600383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650399e309b0bb66a3b7e8546332719f1c218d4a59a2abb502f0ef0cee097c50. 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/ZAY361600384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eebcc55a971fac56b6ae35f1df5eecf924a285049444a962c51c3fa0bcc2b80. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ZAY361600385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efb862e9757209ac3cc2d8b710e347242461ab8255db339993d87a176d06c48. 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/ZA29K1601100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd490d2bc914d802e6b1e98e656daa7a1dd137ae47429fab46aa0c48d3bfccada. 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/ZAY361600386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e8c4de2763adf76c38ed99777238556531444135d6cf5b3ee59e2619e0cde8. 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/ZAY361600398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd171476c3e8fbd57a290619c916d0ea234241a2c505410dea136ed4f8bb25. 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/ZAY361600376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fc4b45718ac39671a6ffa1267238e4816a9bf042a51ae5c9728b59b136ef99. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ZAY361600399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a713cf6030bd254f07e2e52cb91eace854883a92fa926c74e59cf0a747667. 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/ZAY361600387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09dc39982867588ce7aa7ed6dc8992e400fd9842dd126887b71f250daaaea6c. 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/ZAY361600401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fb984adb536ffe952496f76cf820a6506071ab9162fb85ad28c8afa45fe9c5. 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/ZAY361600388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5086ad1f6a6fba8a3e8a7f65705e062eee1d4d156bb386dcce670179e8fccd99. 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/ZAY361600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc897241638be9eebb1a5b40dd48917d312d0519e87420dd12f4c61c8f1d26. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ZAY361600389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7310d57dd4eff47e75325c9014b5a6f996462abb8388da6863783eeacd1c4eda. 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/ZAY361600456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87847dfd48af6cd43272bfd2af7bcefca6830f6723440f7930983ae3454cfc13. 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/ZAY361600391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3c60d903781212a57c37568a6904e891b61aa6b77e30383ff1cf9117e9bdd9. 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/ZAY361600361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd91e70dbffa91fdcc9d8dc7e29afd63961e5ba950fa9801972ab2dcbe325465. 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/ZAY361700468.