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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed07a1ee8c041afd51dad0d4ea330a47fe5b4b44567191e9f435f16173eb823. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec83b2ed-162b-41bc-8615-fb27e2bcd6ee.json and https://artists.proofprofile.net/proofs/artist/ec83b2ed-162b-41bc-8615-fb27e2bcd6ee.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1556c733492c8fdf927f85c0b79bedca68414df0b1b1d32bfd341bc92a4df6de. 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/QZHZ62263069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05284ac54d2557b7bd72d648f6956aca072e234c8e02b7fc30444e84c0a096da. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:55:50Z), 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/QZHZ62263070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6564b6243b6760b626cdc3a99172740b7524144abb1ad41d6cd70ea1ca84521a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ62263078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca36337de37356ce64a1810c71d66c689a198ac491b8abde266c3cac99a9f99. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ62263081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0853d218384f5f4aa76862f94f06cb7e4ece69139da8e7902b7713ad429410d. 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/QZHZ62263082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2826a797eb2c1df8834c857fcbc1e1bf6050d8037ce03752efa63a64847e8e32. 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/QZTBF2310336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728cd30c0980ba93dcbc95e5b6e4f818f295a2a8fa5100e06c89cc13b4a9e652. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:27:54Z), 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/QZTBF2310338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d951b713661d7173dbba59b41ea16c68a1e0aa0286643cb27f31623ef751e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTBF2310341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd443659033378aa40fd3ed88b2e30e20a73201d96dcdf5b9d188a5755ea40864. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2390443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141402ed43297baa2d853cbf07551627e9c6fef79d7de051a419bfa5c71ec3ca. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZTBF2310337.
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 0x6d2eb79ea632eaffc762ea7f05208932dd6e2acd1f315cc5cbc3021237542fb7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTBF2310339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42198482c71bfc4d1891d49b9dd487bdd52c8ddc820ed4e13790b414ca735ae. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTBF2310340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918b2392ca248e3e58f284333aec9364629c77fbe1cbd944c5d4f361ccc58fec. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTBF2310342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9334e67cf679795962abd4dab117b27bc4ebf8d799543de49b2c7777718f80. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZHN62417060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c33385138f52c4f325944419220ed87e57e559fd55a2261c7063bd97af6702. 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/QZZ7S2429297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191636c2cbbe3925d03435c28cac6b04326f71907a494caa29840a4b524418a. 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/QZHNB2540662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cb6c087d35c7d6b470f9dc2c1a97a357a748c28dd3f7a9c310ed333f03d7a4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPLS2571042.