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 0x99766ad08b55a52b7cb0c089f359db04245102a7c7213f7748901d2019dd9ac1. 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/cd241e05-3fc2-467e-8d0b-7aadc4b36daa.json and https://artists.proofprofile.net/proofs/artist/cd241e05-3fc2-467e-8d0b-7aadc4b36daa.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 0xc89dceabf076639ff18dc9d34a44463a4a49f4183be32ea0680a82c8bc867c72. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA82081741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00a416585e537476f8b20aa7824472a17d58d0b13d8fafde52721c53c39be8b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES82075610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a25a7c0be38530e6f427f29c02ab5cfd11d0463a38dc4c7af124308985c222. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA072178091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb7d3c2ac6c0fb13c15e392118495aed8ba909cfc2c650d970ce2a357e88942. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX762303709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc705a8d77df26f9532411e020a8c9b62ab93ebb9252111594acbacd2d79b691e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DGA062337714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd5db310557fb53f1d2ce9e47ff537431f2d1d3dd737f57feca0f8c896953dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA062337719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60747655b8d2b6a8bec9bfd4de084e607591484994dc18e8285607be8fddaf33. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA062337710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35019b3f0d43d4afaff492a53a7010513f93a65f2d7c6925020338dbccbb5106. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DGA062337711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cbc2b209bfd1450599d2d48433ab581218df11768107be86057fe66a4a50eb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA062337712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbad50f7d5bd7d9fd648ca3a0d8a52cb62c922c08fe1e17edcfd365309c4b03b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA062337713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb7d3c2ac6c0fb13c15e392118495aed8ba909cfc2c650d970ce2a357e88942. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FRX762303709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37636289dd7c7b2baef124d275c1aaefefed9128dae1e79126adb83b89f2040. 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/DGA062273634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10eecf38efb3f86e903839f1eb75ecb58024c3f16534ab1eac23ddd6fb03f3f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DGA062337715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567e106fa672658586e676980a536eca1f708151a64ef9469f268e09b6a83587. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA062337717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa387c927e78547fba231e7dba55edc7a7e5f32ff4a7e59fa2d59c8ef1fc79a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DGA062337718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd5db310557fb53f1d2ce9e47ff537431f2d1d3dd737f57feca0f8c896953dc. 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/DGA062337719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e469be9a0555ab17e4b693836f7eed2e9862ac00e36bf74036d9cafea34755. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DGA062337721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8b76712650a43e329ec2b9dcd5cb3fd3d9c68f383678aa8c4a3ad9feab04bb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FRIDO2410526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8060a1b733adb321244f961202ff7fd5136e35fbdbfb3734f70f9de46c593e8f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRIDO2414458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d3681e5de042db5a2489fdda7ab973424778a74f0760d9ad81e3a75109cac4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6N22589101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620bf3889158118761e50588aa988f8af9bf7486e9551f23b068b339a7be41b3. 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/QZDA72317178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d29839a692d16f5da542835dc192a69da5bc087a51a972a996932e20b38951. 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/FR9W11901181.