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 0x3aa4daca9cc7dd571a59d4f2fad1c91c5b9afc18bbc94cd752adcaa50ecb7660. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6686e025-22db-4fae-b721-e9e15773cc32.json and https://artists.proofprofile.net/proofs/artist/6686e025-22db-4fae-b721-e9e15773cc32.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 0xd37cc1d0072ad1705c42618bcae36b61768a70745827fc4f0bb68ccd632fb113. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DEZD92000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eafea5e0bb1649a6473520dfe95f9f81286fb70673790da261fc72849f86c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZD92000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1860f1fbfa2ae67f1ffa3685a032ca771ef56f334741f6cff147e5875334cd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEZD92000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eafea5e0bb1649a6473520dfe95f9f81286fb70673790da261fc72849f86c3. 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/DEZD92000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb985c42f2991400948ed33ec7c8a05fa799e2ada49c865f7343e6206748c8d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DEZD92000267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1860f1fbfa2ae67f1ffa3685a032ca771ef56f334741f6cff147e5875334cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZD92000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbcbffe155edc0a506448faf2d02fed8f6b43e29a4eace76e9861bca4939b75. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DEZD92000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37cc1d0072ad1705c42618bcae36b61768a70745827fc4f0bb68ccd632fb113. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZD92000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa376905d2c64820135e1cb1580debb93b514ddd0f1d416d50e77e569d1d979d7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZD92000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454031ddca6a40db33868cdfa13462905254717563525d7896dd56cba16687aa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZD92000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc29157d62b0143823fdf6810d207659c4a73a189d9eb165b8356b9baa40ce2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZD92000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb54c09e492db2d0012aec8b8ae9b972929d0412a1bf68c778c4c35792bf66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZD92000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270598230af6c78531b4073253530f726866a9fe1a9b44fd68407bfffacb7c94. 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/DEZD92000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d3e872ead6d3982747b6a89184a36993434c372fc3d45821a08c07dd19b777. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZD92000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6359ef9822120fc06cca0e01770fa35688a7797535ae8d6b20e78bf9a8ff32. 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/DEZD92000306.