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 0x9b95cdbed2f5e054c529a8e10f2b1070e69f955353c4f4838206caba8e5e5bdc. 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/64d6ed2d-64eb-4850-8f9d-77c7e301bf3c.json and https://artists.proofprofile.net/proofs/artist/64d6ed2d-64eb-4850-8f9d-77c7e301bf3c.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 0x6a370572c4cf9f6586289e419927169b3fe688dd5a4ccce6e2c3c4fa2f0c74e8. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZ5AB1983461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d58264bfb2f9d65ace9d4d3fa85a04b0396a3bc5a58966b1a738a1b015ed1d2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZ5AB2003515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce7f39d6bd1141469bcfc467347b7080c614316a406bb3b5cebbdafc3a7f790. 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/QZ5AB2003501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a466603d05f827d65bb78b12b33a3010555fafc3ec3ae9ca5a52ba50358910. 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/QZHZ51955498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe4b239a225c8805715fffde2ae500c37da8febbf9a97e022ec080242bdcec0. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:13:36Z), 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/QZHZ51981429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f65976703b90e1503924344e89ef3da3805a70a854c1364c9439f4d2f3c482b. 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/QZHZ42086311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89042fa20cd573154d8d1af77421620f710f421473bce17580c5ea17bbc274af. 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/QZHZ62069309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9452d5705aca9af11af985fb5041b276366d50050257b5cc39f7f7886d5a6bee. 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/QZNJW2095629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29f869560b6788d47aad4e1a4345fa5bbf0a3155de3d3805f91bb556b4370f3. 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/QZMZ92124140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce656200ebcd94f1f3b7b52de90dbc1fd9eaff34cfb5b8f98929b4fa5785d50. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNJV2141110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d33392b09dafdad35e271e874117b0530b9bfb517a57461dc727b7f355bcd7. 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/QZMZ92187722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b6c21de0df4e68e8f5388896be7c2b8354ee12361e4cb92d1c68a6a7faf4f9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJX2119343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470f4ac78ddb0fb84fc313d3bcfbc880f769e28a64e73679c9b5e2f2633824d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:01Z), 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/QZNJW2152050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f25a1ba6bad76a36f07ae6bd6bebf6d011cc97ed540c2655e18c100cbffbf2f. 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/QZNJZ2133547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed0b44529e404500ae8d0082e5f0ca64cce8bd816cfb9a81a7b626ac801b5f6. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:00:05Z), 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/QZTPX2112600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4433db6c531e381a56b16c1f398a9729172aded165b9af1ac6620376702afed8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US7VG2204865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646af29f33cbd55c0ba10f8a411a80707a1bf4072a520d9fd27b66fde921a977. 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/QZHZ32239608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6799778e5728b713cc78efd9c807a1d9cb85e5f474cbc8be5ec6d0817ec805. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:18:26Z), 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/QZHZ52261257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58bbe5ea12968fc530164383a34a752bb798f96cca9b3fb44c7f8179ad7d74f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJY2253737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa456c5809dc0f2e50601b91e26f1df41f8e54d3300205a1c6d63b9ef6af87243. 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/QZW9K2279160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e38e3211c43bfb9f05070054e3caa2b2c291390002e4926f0490fc05114cf5. 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/QZW9N2215766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9180ae605d9b00f0c218f16ded8c9d50130ac378f4e466e82d0b5d2c0a062859. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZ5AB2369209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8611617873aef258113b60d9b797aec1ec27aea3a5c4c5f36c74f44463364e1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZGLS2328802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba167c87da7129eddff822baabe0c962aece0e6f60f41b84385a1ab8f6c34142. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNJV2305841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ad8c2a8788ad0d0e60fa308039d4562d4080247faf59c185bddbdecedc20f. 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/QZNJW2300959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7278186a282fb636851a2b9ace9d4129ab4650b2530d9f0e1f66b10e8541bdc. 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/QZW9L2371280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3fd8a3dceacb227792377c52b4f72639bd4429e8b3441f4361d64e6cc8e223. 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/QZW9M2352551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa87af694fbca3605dcece0e5cc5ee6deabb41b9ab576a2633bd5fd6cdfede5e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZGLS2443442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6691526fbfe04c160fc248db56c4843464bce7f13a150abde0dfc0ccee0f0af. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:27:54Z), 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/QZNJY2401441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab0f17a4a0bc7dd8874ed84288e267eadb0671981d104299df1186900d79c86. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZW9L2457519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9deea3132688f11c9cbab7c5062bf0f6d63b3739acf1e5f7e295682760c1be9. 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/US7VG2530590.