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 0xae9eaa97b93b32c39a50949bd01b018705fda64e0f8ce07d34b405202d2b0a8f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bf7e40e-3dc0-4f4e-84cd-ce039f0af816.json and https://artists.proofprofile.net/proofs/artist/6bf7e40e-3dc0-4f4e-84cd-ce039f0af816.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 0x660826d7a81125bce3dcc856e80ae3612826d7071edfa175d0327bb65af3d74b. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/CZF340500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb415007b627e6c47beb3fde67e835fe675860dd410ae68ca688252016e0548ff. 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/CZF340500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef33204a5b7333ecee9243a64de88e70869ff089f213e6ae7e963a626090bad3. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/CZF340500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2bb553adde945dcdd4d8cb80e6f0da39e8e86bfe5b109b969f703fa22cf879. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZF340500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e213502705e08d807a10fa7bcf0d9f461d10712cd39951d3d985dff9317afb. 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/CZF340500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f13a59a27afef6ac4106e18c35a04df808bfd220a416ef6924423609ad948db. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZF340900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779435002000ea088c71b70c469f7f00c9de61d686414265aa07602879db27de. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CZF340900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a905aef2fed5d9061d545367931b808cfae3c366137e5cc2207057f6cfaee4b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:07Z), 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/CZF340900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539b90bc2f18282e0eb517cb4803cafff2390a34661b1c4346f1e7c7597b3af1. 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/CZF340900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec5b38b4c6ebacac14f91c5c5dca08b9d8c01631cf28e4ac5f94cf74156da7f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CZF340900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04de7218718c3ab5c4a45c4b06f384f3287979ea1636a2ffc95aebd377cf4d67. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/CZF340900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c99752ca2cf6e91d1d747b2be7d256f81f969e32d81d9aefe07cd9905722c5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CZF340900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdd0767b785c83d8c3126f325cb59eb8a10ff8198480eb325cb3dca3e09e081. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:24:37Z), 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/CZF341500602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e512e53a0c7d6a6a11b48a2f56f9b08138faab1309a24c8891e35b23095a341. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZF341500604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6334d2562aaec3f41925fb6c4590a48a1c2c8a521ef5a365976860a9325f5db. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:05Z), 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/CZF341500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b50cf27c67b56f5cc7281ae18378c56f3403080791ae07dbb435fd5133ab9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZF342200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce8cfdffd1dc158686777074d5cf3bb1c2c56926f04cdd444f0dbe43b593afd. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/CZF342200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ed1bc656acc52c6cdc1214febf6d98f811bfea506ea5d57b1a77d0cd662a10. 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/CZF342200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ccaf2eee86810bfe07c41d222c7b914b45555ff72e1c00e45305ef5698ea2f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CZF342200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc8e0a60882b50ae00421055d8d5888cfe9396e215b95cb7301ea864a59f13b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:58Z), 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/CZF342200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7944c52dc0e544e5bb047326936ae1ac216e9ea46af681258e475d123a33e017. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:18:21Z), 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/CZF342200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62b92d309b5607ca6b13d67f2d20ba0df9385e6b6adcdbbd2a634aa7e3403a9. 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/CZF342200035.