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 0xab239e890175aa793d64e9c36bc27dac362cea37eb6d2cbad4b7b284877e4ca4. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94d22d6e-1033-46f5-b6f5-ac40dee4de82.json and https://artists.proofprofile.net/proofs/artist/94d22d6e-1033-46f5-b6f5-ac40dee4de82.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 0x5ef0442f5c3d6b6cd7754c45b93f713763a2f745413aeef00189ac5d3286c847. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/UKXN22547185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7884513a26aa44dd5f49d7e5d67ae99c239bc915c98b3bb892ab0b23a8a365f8. 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/UKXN22546837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef97b7e775565e8c588892b9473c8413dfd7c887c7b4e76628588ba187fb950. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/UKXN22544539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3100e3ea75cd9cdf8d0969eb1c4d549ed96f2f0e650bcfeb9327744cab7aa898. 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/UKXN22546736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683490ca88d68004c4a665be5992a36ac1112eb6894462bdf578cdc83d5708f1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GX8KD2513874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189b040f09c4df16aed265f44333b88917de04da35a4cee2d6fe7df00387d62e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX5MX2434037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f40a8da569ee3431c95efee938e9ff407203a89309fbe43d632fdd674f7d1d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USDY42123028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20171713a75bdefe2776d5915dac561a45e1fc6f41375082b6c74ca30036369a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH2213886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f5197164348ea13cfcc343d3e3da1888ba4c013ce1eee361b01c79dbf3b62. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX8KD2528350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf10490f4193f71f047ae7ffdb8b4834f564220f363bfc8f077348bfd20ed48e. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/GX4R52446165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27282710f4604262ffc389491fa8505f9c04959abad74a30a6c1a7cbc0f2370d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBMA22442782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe9e1116ff574b11d9a47d5e58e2a90816638a1b13af2a87df24ac589230122. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX5MX2488787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44bf869b0fd5fb08a18f2bade5bdf7cabfc41921127fd8f7f65a1ad9559322b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX8KD2582666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e679e08caf189a2e11485056583b234e18eef0fe82408474c266cf0814afaa. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GXF9Q2420074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd421846562aa5fa0017eacb0c43cc87abb1caf90ceb28f354f9a741e1d5ce0dd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT65X2517664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d72f6e85d9ade28aeffca4c2d0fe9b22aa15a82106e19119272a2445486665. 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/GX53U2634897.