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 0x10cc6c53386e91cb9444a6f80ab81d56e0f665c9e774350aafa41444b9bc5e21. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/061ce048-97b7-4225-b990-c38e9be4b112.json and https://artists.proofprofile.net/proofs/artist/061ce048-97b7-4225-b990-c38e9be4b112.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 0xa486161829273ceafd388ef4cf6140ae13225044670ace1f0bab9bde1e180edc. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBJU21900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a1eeb8d7107c4cbb13113ee6d9b9af7da8b7e3dc624ba25a06e0b825a9b447. 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/GBJU21900495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808cd29c64e46a05f6b7b003ebf045138685e8f402882b7105d0cceea4c03568. 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/GBJU21900497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe070060f96a10f9b01471343fa5613cf49ede131bf26f9c7d69e8603e1024. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBJU21900498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad92e52206e6c63eb3dab6a008565f81518618b5f01fbeeeb753cda91c5c59b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBJU21900500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dd2f73c18a2c1a7141a3b7bf2d905a702602c45723e9662f65de6b56ef8e3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBJU21900502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13996e5235bf2733de8a92b9fa3bdb7bb61e98e80bfc3e799833865ae20727c4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBJU21900492.
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 0xa974f141aee834bb2b71d77c2b578b41ebb22894f1ee8badda098f9df6306c48. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBJU21900494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ba21e9da10230c4aef70b7f8f22ae989051196c8036e86ab50ba73f081e4d6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBJU21900496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3c9309df5acb376d5e7457c4b0d592f68412f2377f19db26b06c521a5aa354. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBJU21900499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b788c9f1982ba1b6c0e930994733163f41fa332bdb40672b9c40e49b1378a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBJU21900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d22a7db91a5f76ae8629e0ca787ff49f0994a39299e8fec420bba425620b47f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJU21600179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6226ac905ebc27e9297d1c7cb142c02ee5511f81174385dcc9f39a57adfc2bcc. 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/GBJU21600180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e6e6db362be88db176ddbd287deab22cd2184702912fff0d81c445d7c5da31. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJU21600181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf573e544b26d8cf81fd8ab631c5a4828367b13adfe30fce9dd267c83e749fb4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJU21600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa69411bb5bc3904868dc1aaf9070a8e885fe56167c9353d066bfb64af885bf. 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/GBJU21600182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b861560d4d91acdf7eaf17575a1a0d0e0c7b9c5c6be1736f3de40f543c2c2d6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBJU21600184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38b68af58de138bf9e2cbce34249ec87295747e0d7f207b2444af95470a00b3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBJU21600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5750a7b84d9d2aed8207d8b4736b49e15e5a35dcfceb9f87faac0c72e17f76. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBJU21600187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b53169f6ae78158bb4620e1461a5f6278bb8f39d428ce77a8e19a849f23c8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJU21500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd44752243d18ce8e1e0fe72471038c89ae8ce4967cebf34a05c156405fa2e. 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/GBJU21500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d4f6a8c72d5b486866ba8ace7df89cb2efb011a4ff6563c8fbdd4e51c671ca. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBJU21500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ab1b1b508391fb2d4f8e986103953c16402d2a2200560be2a6b1984a8f0b4d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBJU21500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9034ecd52f5652d973f38b0255b87d3cc18dc89c6ece7876a41a38fc60e80c1b. 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/FR2Q41500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609869abd08b729448740926bf2fecffe54c54737992d42ecedfc1816045a270. 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/FR2Q41500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574b3e7005f0f620c5e7cf0e4d22bd911cd261bb62f79ff633ff573c72ca6251. 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/FR2Q41500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a60da868435deccb66d9624bcb7a46bb97f5d4cb18594a96d815877e7228ea. 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/FR2Q41500028.