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 0xb2f2a45755714bc1370c59f985b45184a5d5cfe97ccf046895e8dfe3c20bcfd3. 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/0b105182-87a1-456d-972d-b90d679ec95e.json and https://artists.proofprofile.net/proofs/artist/0b105182-87a1-456d-972d-b90d679ec95e.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 0x161be8dce61ef35df2430198acafde86919b60944994dc03bb6f103ea742eff6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBGQD0500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0275328620d3060fa882359d4d26e9b2932b3d049c53013b269ba9d6058859a7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBGQD0500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00135f359eda1366b85baaf76f07dd4f0444a06b08a1be5038c928b98abfb4cf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBGQD0500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b6d3f22a3bc2f7151b7a2e9c5876706f814b4cb859fba8d9fda6fbeb676847. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GBGQD0500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3ad3dd0508040e4a2c60fa0fbf658d0534ea481e9b8a5ccdb5513fd3ba4045. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBGQD0500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178c0f16903e0866502b39df143a61dbd6640b300000d38513d71fe8d3d56480. 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/GBGQD0500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd73c69b9a0df16b6a24419b77f8877fafc68d717bc1c042bda1b9cbd7dc884. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GBYRC0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5432ca812d22ea5dfb32c021f3cb242932c144e920bbc62502febd31d9a4993b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBYRC0900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a7709c64b435c7a5f6b955d76ba5e138258e5a81435932bea3ff6dbdb7d38b. 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/GBYRC0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e5020204a48532ffae891555c65fc752ffc69e83b00756bea9835439c27bd0. 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/GBYRC0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850ada1c70bdb9da4e7935ec50ac155fc5d667f5fe8d7583f0c76bb46d0274cb. 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/GBYRC1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd9038314898dfcec2cf694d4af3090ff83576248ab4caba68b1216560625bb. 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/GBYRC1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55564a0e4126b55edb020a997c5d3aaa11c0e538cedeb817c806b8f4b147fad5. 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/GBYRC1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0b35418e72d6b4fa61e4db14a65a9efc9113512c60686bbfb7bfa3449c9170. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBYRC1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f10eaf0829cf0765a68be4bb8db9bf7faf28ab7daf3720e5d3335842deaa7cd. 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/GBYRC1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e79e882e124266bf0ee32297ac39a7e34dd70cb55adcfce74291d4f25a778. 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/GBYRC1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036780baea2da24f06c2a4368f70be2db5644054a82f6b4e6f56d98b293c46f4. 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/GBYRC1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eadfb5b4e3435f484664658b37c46b7d1803d242b548f25669caa68c99a9f7. 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/GBYRC1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c6d01e5b78e5702af0e563d5f4bd2dea760df0135402e427401dd657299902. 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/GBYRC1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cae63a9ab469836a5102871ac5bc6fda5cb4159361f04c8ad89c2c87b2b8a4. 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/GBYRC1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836c7e7d2b04d4e53f969c895a3b684090158c3b4955a93d365b549b3caa0633. 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/GBYRC1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3b6d1f351047fc27bd73711016d3389d0b32c6f35707f6dd680c3f00ac694f. 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/GBYRC1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd52c0f59c8563ec138f07f91603dfad83cd1a98acf2b2da5000cc13d09cf3a7. 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/GBYRC1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be220acd423651a7e76239fa7e532e5a30b5d943d3429f4c874bf5ce5f884b. 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/USHM91922857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9f0ed2ec07e09041ea24e44b3780e95c0ad17c238d4c6670da444438b46f49. 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/USCGJ2008663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0c0811842a773ac57845abc6422198fe86923ace5e8d6b2e525c5118f21af2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCGJ2008664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca17d6870deec62fc32e531432f368a7e109643c0fc5d8011c4943c0d9531032. 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/USCGH2530737.