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 0x7380f511ecac594cd7ce281acbb65d9bfdf2ec3d7293a377036dec0b0b0fe351. 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/171b99e3-f695-431e-b00f-18c194c71755.json and https://artists.proofprofile.net/proofs/artist/171b99e3-f695-431e-b00f-18c194c71755.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 0x8ef98c078255dc9208d73c41950c7ed687bfd08327e79eee617105bae69c9615. 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/GX5MY2359994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00691bdcf4e1529f4d514627eabd5ae341fbfa0607e935e9f4d8d3a21b89ee14. 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/GX5MY2366106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524dad969716bc4f325bbcfe3a849c94dac4659d565c02a32358b1b1f0f97b30. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX5MY2379939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23c217d856b6fbee6444e58f1468735ca5827e5129a532d4e54f16e034f9cec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX5MY2350134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb68bd1e2e3f00260631ebf24e9640100a93106bedbe1f03d0c0dd5b2d553e3. 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/NLT2H2300856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b09ffa08cf6fc7507dd7ddae7afcf822a9a9560220c966c6c0b4b91a6196a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2300644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb6a487b1f6da768b4875719dab623207014c80bd6bb483fb78896c4be19789. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f156271303c65085c23234704c9fb4f35997d5042e55aad4d31592612ddb8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282a7dd839d88185a16e4cfc19961608eebf61350b457ac6f6d248088543e418. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86b822064ff6d169fdbcc5b523d114f3bf7af364f7ee19d8b3e78cfdba5ce75. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM7282321900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda291a4c880994c805be258b255c0a4665e4fb425aa6a69342592723fd975c29. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f5843d45e9a2fea4e84013be98f5353b6f029f5933901d36fcfb3ae3ae6114. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2266574805fafa24eed8a15153707ff26dc0fb5f81767c5855af133b189f08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8LD2380193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd0d2f1bdc77f26140986f0a6de84f8e28b80fa379cbb6ee238261ec1e29ed0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8LD2341471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc115c224b33b33f862ab55b61a84037a1b67bbd7b68fae734c48314740a9277. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8LD2368442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8969a345190bc21662d1ce867a69b9c98216bb017791206331e7b705f300b4f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300094.
Gimme! Gimme! Gimme! (A Man After Midnight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf040a3ecc25f53361cce7907098445d379768b3ce48922b6e80095a2cc7f0b3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2200883.