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 0xfeb424f7b3f4de3bc5954ffca06d0a0d3e09b0fe65e64da1899649c657bec580. 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/74daaf3e-cf18-4d9c-ba58-684c6ad4955c.json and https://artists.proofprofile.net/proofs/artist/74daaf3e-cf18-4d9c-ba58-684c6ad4955c.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 0xfbad4f26feb7b0128a2557b81a5a526c69b25df0a479a426989c8078ed22cb27. 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/GBLV62020698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b5bcc258a561e32807b296e834ac61eecbec6882fd0f6dc6e9d58999089daf. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:59Z), 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/GBKQU2113522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb77228d30e6b8809df5c8e1ff312de0af32b52c408dd59dbcd086258dd0cbc7. 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/DKZVA2300328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb848a5b6e996bf921fdd6e5a8d04408fad127c3e7b78b85d749c0f8bd60b79bd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:42:50Z), 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/BCVO92400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8974e80e2c952b4d8717ff3e3dc124205bd1930874c6f07678678bd023a66a. 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/GBKQU1650643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7bbf4d8d1bca3291181a30f0a3b41ae34e99833050877782fecec446724c81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1650645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e984bc141ec698e3c090839f575d6f518f3e8c6dc29813ef2866b756cc09d8a. 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/GBKQU1519481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88fde07a0a90d723f9149efa0e4e9261ffbddde4dbb75eb45a41815bde43f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2316013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c435253eea0d07d714fd8354be9d24ae2b90fb1c9de02ce282a5b7f808e29. 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/DKZVA2300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe97fef546737df32cc91ccdbdad53a6768e478a23a65dbc36c071bee3178a5. 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/GBKQU2250326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed820b67c815ef7fc5c131424c2fdda22eb4b94e16ef53619267bdc38a878c9f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCVO92200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65efb42d22ab10ffacdf8bdf2f961bc9e4af61f027b54bc0d53d151a709fd13. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCVO92200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4fa120ca674875be8ea6150cb9b9f0cd28520f67cc93023c665b95911627a4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU1650644.
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 0xcdb1fe58b54f36769e47104fc34e6879fea803d9cb20052ace4082eebfc2ca7a. 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/GBKQU1519484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a248254d3a19d83d96c1d25c7437f2b174556bc7c7e2579812e5a8bb437225. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLV62031715.