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 0x5d930f49d6c2d334aa5bbd3c4ed51e3416b03f92d623c7ae595a4605da1cdd38. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b8e68ed-7f8b-483d-b47b-81d10e3473cd.json and https://artists.proofprofile.net/proofs/artist/6b8e68ed-7f8b-483d-b47b-81d10e3473cd.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 0x41f0c190b6e697bbef883198462dbcdca330e67275d87c8e31b5d2ccbefe70a8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:28:05Z), 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/QZW9K2325095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb3daf33929c44f86dc7751e0225552db384efebde112c8b76e973c9ac9d9d3. 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/AEA2L2290480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90399ddc7cd05a16f1923dc7d6547f29216ebf00bf38e2580fc658149b6d48d1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:54Z), 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/AEA0D2215731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d3c5de669a7d5d65677e7501b01c546c354b389840c486c7be833f6df425da. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AEA2M2130586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5e1835475524192546aed7bf0fcc8c57129e12b087c5284eccfda2a2883d12. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/AEA2W2322543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc5ce596f8c0ffde5aa140ccac7f8929aeeec80c73b9461dfa5efc33c472197. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AEA2W2389161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384e7f950328de548b7de633ff642c575f7b877ca61d4365a74a2d6c9f52bfc2. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/AEA2M2339960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d922239160817032321ec5182015e373a500da766398e7082dfb649eb5bb8a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AEA2M2398779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0780db4069c3d067effc349c40a21fa02c2306dabb3e9b5064ed970d20ff7cc. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTVM2335672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a37ade67af6dd77a1f7f4eff0ffb4dd9b27b3046c29f2cd0b41fc72136a0fb0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZW9L2369921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb44cb3fac393f74e94a47e37af2118b0c3c701d67b82b6f6e64366b10178b0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ5AB2469990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba461fcfbfb83e89185dca75e8bdfcb78abc889f859cd88a2d7525e64df52bd8. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:21Z), 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/QZNJW2408384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ccbfb5a864314c00485121f91391ecabe1e5301e689e947646925607c5dad3. 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/QZTVM2464994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7ffa5aff943cffdf28c00730445d7aebd48b2ed26864924865dbddb40d7bf4. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZW9L2485940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012a9673e6345ecdf5d0a47a499ab75ace233a6413fec3c9cf88e5a8e67c6827. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZW9M2475383.