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 0xee14730a7f847ffab1d6c7f64adb5d5a1b12ac6e039bca0aa3eca3652518e086. 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/f2fb7e02-118a-42d9-92bb-c3fab209c22b.json and https://artists.proofprofile.net/proofs/artist/f2fb7e02-118a-42d9-92bb-c3fab209c22b.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 0x51c55bd19af3789f1f054038ae7288ac30a7c3f93518e8cfcc09422542d5c5fe. 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/QZS632177535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214543e3617915a8528e405dc1d2968f71d06b249e9cb11bb926d0aa46322dea. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZS672100803.
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 0xd2620e149b8a5263df9159a6064a994c4f38118e19f7bf4f668451df828cb778. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:37:31Z), 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/FR10S2202182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07da7694fc01ff388bdcb859a22b05b060689bb3a15417bf8dea40bc1030e395. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BE4JP2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c7d2b89a814486999dd4f12be50151960ae7e02d1dc3cd30f733319e7af0c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BE4JP2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4beb64dc1f26b91de82b061e737b5fba2b56984037ffe04c7a643ce57f9fadf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRDX62207380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46ac941208713c6ed2d8623a9375186bb6977f5306fd460ec48452b71adb1a7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRDX62207390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568de654ad15f19f14ce63979ae3a791ef97bed70c79eb9dd1268aec498bb6d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZS632387656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9047ef6f562042b401e91b0070416599c6f5cff3a05393a74bc69893a42f0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:57:34Z), 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/QZTB22366014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b7486e96c50a151778e83131b4ef4fd0bc44fae071b2685efde1c84fec90be. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:06Z), 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/BE4JP2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568e1f87ff7b5dfbad10bd25db06a3694c0ce15107487b0326ebc84e560ed958. 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/BE4JP2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03ae8fba162d3a212a7a52c2cd59b8fc94e2a2b34ebcc65b75f7f7007b8a188. 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/FR10S2480273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489eb974bab3643948a9e3e60901886dab7701b4b6ccee6dfe18a8a1d8c42fce. 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/FR10S2480274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9277cb6bd51d3e8d2efcf47338480d7934f00b76c67e14a882a86e76f404366d. 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/FR10S2480275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1b14e4f68f404248741a8089a4cefd356a990addbe545265d0fd1227e6862. 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/FR10S2480276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf442352f86b1de58c911395a4955a6a62e67a6173e61d82506d1fd8e38f363. 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/BE4JP2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2a408421dec1adff8852f5001af00fc78134cf69945876f147e8d57f215c5a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:21:24Z), 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/BE4JP2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34667c36afc2dfa032f5d36e3e6a30249ceecfff6ca3004f73bb5dd71ffe7d95. 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/NLCK42415829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9d126d7e3fa819dca4cbd0809e5d246d59749037a1a353a4490e73042a42f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLCK42415830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b14ac9de2f8eeb8390d4338912d0257c35c06ecc8a964f368872d68f6874462. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLCK42415831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dcdd1c1a8329d1b5d80a541a4588520defd103308fef5bdbe2f09c5d7d21c6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLCK42415832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b66613be118f5fe45f5802d6d745f50958ccf4f4a46b7d9553961b5996bdca7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX452577956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60665129cb91c5f3c3f0598ad19805293d310b697edb19de3fd497c405f3fdce. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/DGA052519896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81135c5f53e8845fbe3451206477b67d64bb0533127e4d506e53eed8f14ed1bf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:49:19Z), 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/DGA052519897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c489c94de9a070708c2fb93191e7a1ac7cd0cf6308da4d991327e6f31bda5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTB92274312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2751df77e42979d6291beb269f19b691287fa56c09a03df29a02770ae21e0d2b. 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/BE4JP2300013.