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 0xa6a13be1bb7cc9852d6b7c5930bee319f79451270015e92cfac4500f5b57e2a6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/570e8140-355c-4343-bedd-857fa14fcad4.json and https://artists.proofprofile.net/proofs/artist/570e8140-355c-4343-bedd-857fa14fcad4.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 0x8c18f34ff910d36a0eb8151be6e2f38e64a6c31fa0cb393d7ad1db3740cdd1bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0d171c5cf44946887f4ed83f6ec3b000f3828bd5eee5b69ae5a7f50980660a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72317251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ba094733f588614181a1cacdade422a1029cdd5ab3e4e674e6cbcfe04b0b1. 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/USUM72313239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d07609f5c2d578feb615e35852730cc966e7f90af5fed275b3bf90f11a5f255. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNA2334240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266132e08546c9853a9e6b4164ab45cedf50bdeb0863252c027b8c2d18c60fb0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA82303675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe15f7e87b744ea969c6d1b6c6616c2b3422d1fb452d0da0d84d68b951e5d209. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMEU32300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f788fe58f3c9558cb20e1ae9118ebee4b45f580c47e64c8f550a4804cf4193a. 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/QMEU32220095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f6a2b555b8dcc56b172c59d8352e299f55d60aa69160f58703a33452736087. 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/QZNMX2248374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad159b764c8a74d814eb374c2851fbfe4fbe292aa900e4d828756fc360909d0. 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/QZNMX2245030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe38c59895afd7679dfe193d74fa56c3f6721dde304db7a0a517a8c25158b5f. 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/QZNMV2267024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bf666620c302f6b9223a6600c2c60fc8d533a0acae478c27bac9190cff75f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNMV2241347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041d2160e084d8cbd4510c0af54223c1e4613e24c18aa050d6d2fec5cfabc7b6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNMW2120160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575973dc7ec687e685c98d410cfe0de9bd145259a59721e2ebacb91ec397c72d. 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/USUM72402513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a22bfb383e04f02d2bbfb4c9ccc3613deddb22d7bf46763af8307c4d13043f0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USAT22218636.
Vulture Love Presents: The Last Zombies on Earth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb722e509f2af485d0e084cf222b04153e65baed936b90a2e8470375c60dd2392. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72406340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333cd7c7a2c9b8a0d8c36202b02afbf6015b5f37b770af3311c4cfe47b1d0fe1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72406303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd396ac42b5459d1d146af3d4e65e76a27df5eb394092f648d2d8b27385a1afd7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT22304647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd37bddc77e2db78fd9a363db6bb5d54db5c8df99bbc467f44f4443368e1f083. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZQAY2477018.