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 0x4085e145136ceb1b730469b1888205e3f1d9aa50acb2b5789c453dc066684020. 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/c86dc8b3-3049-45ad-b270-0ec50f392cd6.json and https://artists.proofprofile.net/proofs/artist/c86dc8b3-3049-45ad-b270-0ec50f392cd6.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 0xfdc6a09e7e2f1d3969fcc4177f71ef4667004e362872ebef931a25372d577ac0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USX9P1362192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9214598130179d23081267e69522eea7690219eb9b04e25e22ebdca922e3579f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USX9P1362193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68470b521817f929ad51422847f12b09c6add1e698ead0304636b5c371a84ffe. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:08Z), 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/USX9P1362194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1488adb1bf40ac2fdc47f44e35dec887c1ef9f411518e903e99b25f6d5769032. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:03:23Z), 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/USX9P1362195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6d2301af2b69b3fe97e14b6ae636181385ba5d7d1f51320bd17a4472c8f007. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USX9P1362196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af77b257657a3c3e116fecf357f10a4aa63b1216d5edcaa5696116020caaa35. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USX9P1362197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e2fefc259c68f35247bb525d187fe90dce33a92f80e5a0eb10b97659b3f5c7. 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/USX9P1362198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83ab8906dd2626d4ce331dc50031bfc48c23f7ef3e5372ae7cda135874b578. 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/USX9P1362199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebd2c8a5bc68dc675981d1bcb6aaf365ab2c24bcd836eb06b72a78d702501a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USX9P1362200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf0ed5742b58a9c4bee6fd8d53be3a4ad58a30894c2cd319b79d42c1091dfa7. 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/USX9P1362201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b7e00dd910a14a0bf60a9685caf3c3134f4477259d102caf8e99b22a98a3ad. 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/USX9P1362202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3ebd1d395eaa89624251f412e12afb51f8638bfe101f01781684d18a7e294b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGH1962107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b54ffc7b9fe51b4cc1db3a487f8c64cba0a6a25fc7c9a27a8c9c4c5e6814b0. 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/USHM21971628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f804c10f9d7a454de01fbeecf1ee4be4ef0ae55a3a69b23de383ebdd837b34. 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/USL4R1909296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856bc9be27982f6adc780a65ed72ae495da0093082f3d03d4fbb4f84d7952ee3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USL4R1909297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1d30f41174442a22cb839d8503107a0c8f1cac832695d53fe634b00ee98ea4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USL4R1909298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b245c3c3dcdea1b1e220ae184fb3915b946801f2a51de403d8996df034e2f1. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/USL4R1909299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c3b225e92a96696d9b84e3fb58f6a3bf147027afb11b6ca01b9ef008fb3299. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USL4R1909300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20efb8dcc3eb81e1bdd5c153fa0326a2050d327baefdba85dad3faa3c1d5603. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM92190525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6150b97c798e43a080b864178ed6d190d3c07454e9f280e7eb6d074e4b7c8af. 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/USL4Q2146439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec2d46a04727abb1f69fe3ae8e90170aa9887f118b436d5d94779ad74c70614. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH2251267.