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 0x5233924e35dda190b627a11bcf583f50531d015fc9d0f041f3d29de327768f3e. 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/3e9b3e1c-f2f7-4361-aa26-f8eb6b798e4c.json and https://artists.proofprofile.net/proofs/artist/3e9b3e1c-f2f7-4361-aa26-f8eb6b798e4c.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 0x62df58659a7fe83ceb75c81297fde568f7769d3b1fabd202fe55cd0b32ce914f. 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/QZZEB2361064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec547f39767b3f582b2c54b949d3f52835e58e8e933327faf38f52290cd48b. 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/GB2LD2320336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dc6783c65dc174ca1cf78385efe90201b31b030d6370b90266d37c962454e5. 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/GB2LD2010110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dc6783c65dc174ca1cf78385efe90201b31b030d6370b90266d37c962454e5. 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/GB2LD2010110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dda5b0f94bbffaac0f74e799d7c5a8c6092afe7bba93a03bb1600d36f1844d2. 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/GBLV62308696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8762cec73d10d8bfa9f75081679f4f71e693932c2cd01704a68565b4f5744f. 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/QM4TX2374955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eac392b1113185297ddef6f02c592f46e3600a5dc068bb9fef6016537363665. 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/QZ5FN2466300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306ef2b9da86bf1ce56b1f3c11f4db425995ab7a19afb39669c31d4bf4d02af8. 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/CAQOI2401770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a9a61452a4b8276537bc96d38895286335363097de6449c2fda090eecc2fa1. 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/QZMHM2248353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b8aa8f6cc714368433e0f6cd121c8eeee09216560defe16ad9df0f42dd6e0. 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/GX5MY2319586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b2fce77ec4d20ff2d8167603776648d223423bbaaef36fd76206839bf6836b. 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/GXBDS2355308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300408c6678baba2ebba415a2d4e6179f15060e1d99b32078c01d5fdf4dffed. 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/QZES52169005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370bbec18aa6703d4776870c8bc94951cfc339470315c4df144da0facbb1328. 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/QM42K2061598.
Fuck No (feat. Brasstracks & PhiloSofie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d33a238f34a9e754ed4bd3d94b439732ab4f0f85c254d2ccfae29e4265a2df8. 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/USWB11902130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf845292ed239488d499798bd9705f9a073bce1bbbcdec1535bbfa2d9c448ba83. 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/QZQQE2100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcee171dd41f6df8e6c17e4f26d4555439c90b28d8755f8455bf43c782a390c6. 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/QZZQE2100454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b452e39e760591f104f9762de1a210201b9e389d1cc1501f13b6b2dc8a389f. 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/QZQQE2100434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865e95a8afc30adeddf9f00ebfadf7b7cd7afa3e35a0594ac48d47b940ad3ea8. 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/QZQQE2100457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe462b3498aaf766da75b6003103e9f51d1acc44ec37b8ea5075e1201c2e7bb67. 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/QZQQE2100447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630b34fd75fba8b786d955cf727c2485aafd146c01f4b077ec78bc26dbd6fc86. 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/GBSMU4690085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b5f38025d452429d645dfcd9b1e2904d535da0c349f876c9ab83fd056eb6b2. 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/NLRD52500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fb475ab6f354dab1494bd067a820232b03b24eeff51f5e17373ec347adf2da. 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/QM24S2307651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8da3c70fcf80e7add1d5a1938762473492a02c6e3f5d31fdd8890dc0588c37. 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/GB2LD2510094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cd4ff6fef473f9f64424e7eca2940dc93ae468d92e027392ffb20f193faaa4. 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/GXBDS2412634.