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 0xd455c01295743b59ca95370b967ba3fd3927ecf04cceeea39f7c57ba7a3806e8. 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/66a4b883-fd5e-4db8-8a92-73f41fb97d53.json and https://artists.proofprofile.net/proofs/artist/66a4b883-fd5e-4db8-8a92-73f41fb97d53.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 0xaeaebc9200538e9a1aaf825db20424f6d7f0d7bae1dfafec317604bd5e163cf6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872081944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c6975049083e584ad544a9c0c5131cfacf87bb0a9a94dab8b22ab1a045466. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/GB8KE2211092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4915204a4bb603d831a881db691dd9a5857acbcac74113df55c276bd859a97a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D2326685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab606de7552d4bf20b2c470b22186a34ed550c4ae507baf32dd1bb9bdf61f0b. 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/RUAGT2315059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe701572361dd851d1bc7fd03f5e1b57cd4238bdb473dbf360f0ccaea79c00acf. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/RUAGT2365657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4323c142c99bfecd472b4e57a4ec6b0643513df486b3e61e88ed3753f44e30f. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/RUA1D2417143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36214feddede200b76c799c9339b292cfa975a4180b6354ece146b249aa37f37. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D2420748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b7c3b3075f28043578961df1364d6783627acdbfc08a5de98e69cf7e4fda8d. 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/RUA1D2430086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6356ff0f2ad6670fceec2053fb518dc6b7dc9dd684511a8273da432de02716d8. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/RUA1D2430021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8128ad4566e3c7b6a5b50ef864c4a8b6dc1ad8999e609c6156518b60fb581aa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RUA1D2453425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf5fcc3b68a6ea5afac734820bca6b2b8a814889c59bf9475b30ee9c6f5fdae. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RUAGV2406065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5138ec4d8551b0d85ace2abf82e87d433b794b6a00d9ec2122559a5f1f09e77a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUAGV2406481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54763fe4de73196e3b246030025558a9ca768e16a11871ef2148f5a94a443746. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUAGT2455814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8277386f2b543026131ca1181b8fb37a97c537cea9ac6e6e68d72c4131b54a7c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/RUAGT2465133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0769415788166f01e8b8a6efab76c777c8187dcc60ee9b34c73d3abeab2cf3. 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/RUAGV2408274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2163f3c1fb360ea3cf71849f806c571d0d56d14d359679fa346d76a8ef29f699. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUAGV2408891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c5fc23dfce65d2ca082f34e14a0bccdbaf8444e854f80c4cc37c7d07dbc878. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/RUAGV2408347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bf6e3d533f58b11d347efa88d59089cce7df2fa8fbbfc3049b8ff7ff327227. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUAGV2410208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90e49ccdd9216eecef11ac183e2bb25b8c07f33e419b89aacb5038aff627959. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUAH62402244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f9ff3004496707715d5bd6b59eed3d95ab9a96fc013c4d6d391437ed0da7ac. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/RUAH62424546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d75403f7c0175d721d7f59a023c24d06cfd3961e7a9f20ded07d9529c4cdc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/RUAGV2410919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c9a622196a5e65dad2c0ec18d929e1cd2a3e3b6eab7fb9babfa5199fffc875. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUAH62430347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf6e05bdf3a11eb19daadbfa3d2f4962cc15796e0e2923105ffb8a0c13648c5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUA1D2502908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26fc4f944e695ef34af6fbe620a5a571ca142d8749a0e8e91a70bbfba3d6c9d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUAGV2500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4622a90d9a1991f910b4e536608d3a758175e6469e556a28cdc0f24f72acabad. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/RUA1D2516289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e032c91efbc2903d542f1f5fa5300677d30860b26cb42098e42c003b238fbd7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGV2411183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6739c27ebd54661baf4d1d51b32cf5f5b7fb39ac49545d7e61903fe94c38889. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/RUAGV2501271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851015c02798232cb81d84f5a4f35368715b714158e0638275068b259d66b34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D2533490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f51399d98da5e9efef238f5254b57094973b276a7f397e3367857970e5fce. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUAGV2502366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf594149c7321b3a7dc0a6b26955bd6da0a43b01f0311f0314f3ad63b30d61d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUAGV2512340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84149c45de874bb87a4b5cf21a57f27c3cd0fad3a818feb09b27c0ef854a9abd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUAGT2570920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97568dd10b0e304ce9cb0eacfd7eac0e0b445956204b2d6035c4b633f0a4480d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/RUAGV2513607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b894ec39e78472695b28f14640d2c1b9fb6413e0bf3a8bfc6a6dabb333b52d3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUAGV2514496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2194af2ffa00784c9138bfda14ea5983b7a506417343a77ba95862c7ca249b85. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUAGV2514788.