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 0x7046b59eb0afd6045d09041d3b30f961c5acff93079fe585ac9d568e373a56f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af07ffc5-c6d6-46a3-8a1a-f0cf4ca3d3df.json and https://artists.proofprofile.net/proofs/artist/af07ffc5-c6d6-46a3-8a1a-f0cf4ca3d3df.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 0x78e62459fc789f4bd6d5b7bcd4563981835fdf5099f7ac997ec60b40c42d6e87. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH6541786650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6c9afa504fda407434806c007685e81b8036f6e1317f9cc4f5acb068886ba3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH6542067358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ed055eac6ae47c131a92a2c1c63a6ebc127c08f54af1e5ca8f42d5e487161. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CH6542164599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb70e26b428768180ab3580fcb29cd1b3aa3a49ff58b58e4771844df320bddfc. 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/QM3DF2128820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf7aeb961f86fd56fd4a176da38c917082acd4070df1224dcbb0c5683e3073. 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/CH6542235616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5abf33677c835f1af80cfc2ddec95e69bed2b307f2cea083c8559d2979a744. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH6542235615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0aa2037ee1bd03c9a0363cd817a8adc790928664a8ffcd8559553fda8b6d2f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH6542235614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd238e2c210859b76076a4c332bafd10aa8888962daee179b55bf0ba31e691. 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/CH6542235613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07490fe0c5882c7dbf457b1d44058b07de8ea69b405c7f774fd1bc435f416681. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:10Z), 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/CH6542235611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91834f09ac90d88a741b640911ae2b7318c4385aad41297136f5510ee63273e0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CH6542235610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4082d167008b12ca533e03994a1c221f9525aeef0955ed377891280d4e4f2a97. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH6542235609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef1e2a1f22e7b92daa04d332274bf4f801029a1755afcbd2abaf7c231c44c79. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CH6542235604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923cf59b9a9ce0ca274e17b49a9b416336d6f51ff81710645060a6887459c4ec. 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/CH6542235603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998cbe1a8418eddf810bc8c633259031f75eafded9f619a0b9c98533b9076c3c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/CH6542423606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56a65dc0bd05fcddc42e3f6168c755af16266efd5cdd3784bf5befd75d903e4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:48Z), 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/CH6542423605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890957d060122176efb199fdcbbae8b4d97465edd2c29592c7061c2d57fb76b8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CH6542423607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e02f4c0f1b9548cc2bc5d389b3699ea32fecba982146cff794d97202827efe0. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/CH6542423604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f55d6105553c2fc5564cdb912212e021aef138763474a1364a671193edd464. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CH6542423609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d1134a16338a33431e6ed7950da43377e89061d27147cd89085d6cf6b3e964. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CH6542423611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf718b7a238ec63ebdfae8bfbb80221f830fd887efd52891dd75b3e48fac41d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:33:22Z), 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/CH6542423603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95767574a41aa15bbd7824c62a0eea1507c546a2b3d1e2c305ee2828965ad126. 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/CH6542423602.