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 0xac11f22b0b8cbd4c6360f56c1acf7e824e8a39ad0aa3f70050bb98d4b8ca1959. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc59d9df-211b-4d13-9a43-63c8cdc8e2d6.json and https://artists.proofprofile.net/proofs/artist/cc59d9df-211b-4d13-9a43-63c8cdc8e2d6.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 0x74ec9dce85ca88f04b885634299848dccef21cb683eac1f22ac11e27ff7c7878. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190740301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d19acd35f49e0cbbacffafd89d26102edc7a272dcfa7bb6a0571ee5a244838. 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/HKI190740302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa273b8c0f25ddd156ce3b0724e7dea13b75575b6a83b0152905dcf7aa09cf260. 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/HKI190740303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8269edeae662712df1eb764bcbda655f340cda64ac4e4ec49a8e980ed4007055. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKI190740304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ff4d584fc9231265b805cdc248dc2da07fb1b6ff2fa2b3ba64bacd2d1bde08. 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/HKI190740305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7fdb775b199b916221d6fcc424ac1dcf960737547978e91b3ce2fc8f0ffdc3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKI190740306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d9d97a3db6bb494a25c89319af324e6099f695f86c2f620e457cd47eda23b7. 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/HKI190740307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9293a1302602681d1cb2c876aa65cfb8eb16b1245050901b846f042f555ad38. 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/HKI190740308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7cb2b2bb1733477b674b5d9b3f7e89c2bbd1110c912bfd8ce0f6b0516342f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI190740309.
Sånger ur Majas alfabet: Midsommarblomster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081ef8eb4643741ef70b438ac39489c7f09a51bb257fb03a801293b763de477f. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/HKI190740310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4ce58e73c40d66ffe6ccba63f5f6a38521f3697950dad69680460611952b35. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI190740311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8983354a588868ec3e3f39c8a5fbceec701aacd1ec0780dc2ab4cec50a95d200. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190740312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f8c1ebd76e4774df9dbae3446ba84e173c38ca4dbecdffc644daf9735cd5dc. 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/HKI190740313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d3fbf34e79ece89e44c6e1d8e54ed1c10b452171a96226b824be6cc66cb91. 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/HKI190740314.