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 0x8953e88a69d3a067fd2494477fbf8e5b0da4f5fd4bd2168e78b9d1783b0f6483. 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/aed44a49-19e7-415a-ae74-d6e17ad41d2f.json and https://artists.proofprofile.net/proofs/artist/aed44a49-19e7-415a-ae74-d6e17ad41d2f.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 0x1c1483e4c331765703829f6664ba80dc89c4eaccab9189b26e774ce0ce56e206. 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/KRD112400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ce32bc45307e4a00f007158a49159491661023f743636bbd03b0eb91b8f1bd. 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/KRD112300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f381d199dd445882cb4126082886f8849a983af4e1c550c1c2d81033886d3f1. 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/KRD112300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f1e61dfd1364991ee965e0b9d77a801909d31b3ad18290684d4c03229c2c15. 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/KRD112300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fdfd4d2ff55e6f25abef75422b71d4713174eafcd4635cc56dc580bf26b46d. 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/KRD112200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8638dacef268f9e5858eadeaec0a6ef258ab8a11e2651394693827afc04742f7. 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/KRD112200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77264e34dd4ed46c46dd02fea604fa6b9aa159ca75bbf5f36a72f708c1c9aaa8. 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/KRD112100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a9c846e5c801ac1fe697942683c3505fddd68a3e0fb8daaab223e4845bd05a. 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/KRD112100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83be1d861971c40161f6b13ffd2df22e20c49e6f3bcb35418ce1a0a67593a6f. 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/KRD112100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199c5ef56f1feb96ef317809e1b84c62bd44734458a043ce735673e6376b0d45. 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/KRD112100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7b1e9dd9f268f6a11b273c5eed961980c898a5001f18c55c16b7789146f86a. 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/KRD112000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9bf6783c939a73b82d5a271af837b609ae206413d0eb0ac71402d50c458d1c. 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/KRD112000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2ce2d890e6102a96015efc1b9462c63c9cfb2a2913ae9e2ce6a2df6890e795. 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/KRD112000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c25f19961041c972e151a84ff850e36f0bca8c220c5336a779bb80009c53ae. 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/KRD112000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20303437e8809b861dfcecd2a3ac25fb52f4a2d32fd45eef5f6012544e225c5. 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/KRD112400025.