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 0xd50a84e05bb6dd9f077af06686460a37cde17d5b7c26f93c991f553400c290b7. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1c09762-7962-4070-a469-4404a4926df6.json and https://artists.proofprofile.net/proofs/artist/d1c09762-7962-4070-a469-4404a4926df6.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 0x312be54c04af2aa453d2f3f50193e0c8bf81f903a2b227074ec2317020dab536. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GB8KE1856394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a86290171796b279f3d2e8c525855c58a5c09cd2af22abaad6ea4edca93eeb. 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/GB8KE1856395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50bb2656e164326bf53454fc26e2a44776a627da9e3983deba34a2e62742271. 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/GB8KE1856397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdce1cb574c34e6acbf3127e5314b6346e74f3897fd34970d97ad8f66216e97. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P1945078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd82598b13a440f58e39371847187595d82282490d13ffa122fecc9996ae833. 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/USA2P1945079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03632748f2ff7199715064c3735e5ee08298655fd717f068e0b592c22ea16d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA2P1942745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcdc6c5b1b368681a35bfd9836507f3a6bb91befb231b7f1cf58c6d8de8e884. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USA2P1942747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8493e02471c246e8fbc68cc606ce9cd6c1609a363f4a91c1d371f15fcf35f103. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P1945080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101784fb52db131c4818c49d1f8ea17d17cb66c830d290f7bd5a597b8dcf4d0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA2P1945084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc88370f6a248260e76e20313b6805495d5fa9f1610feff6005e9c0aa9865b3. 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/USA2P1942744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02be8f21326e1cf8a7ed309ffd2a2d40de9cacd661c45304602ee7c9bac23d96. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USA2P1945083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f7e4495ebcf794702c2e7b72dde46c772bcacd502f85383cae67842079f52c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USA2P1940633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624b36e86c441326353dc949438a96995c1f43bea8ae1cff378c2e2917e5d2b4. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USA2P1945082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814105190ea9264fea1c1078318f2966f8cb724f1a2cb6632a2ef93dbec29dab. 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/USA2P1945081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c33ac9e892604676e06180a0dd95e01069397beaace91a68ffa79dc748a3bea. 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/USA2P1942823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d68a3d9c4d0135c97a7b0e1b1c53b0bd9b37a8383c1dd08f782b5a2cb7cde1. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USA2P1942649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cfe1e06fc3805134720cc993e81dd70c6a35acf223dcf7deecc44b02e99209. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM24S1921784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde466628537a0ba68175ebfe7bdbe343dbfb6ae258ad9d089b826dc53dae4ca6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM24S1921785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148883188daed66129ba203c37114edaf0ef9cb2f37ad542366374b72e6d0209. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QM24S1921786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185dc2f705c293c9f96d9d28a04911e9d5e36b465ced211dbc7b387adac5183. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM24S1921787.