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 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 0x3279a21035d070208006626dc1bd76f85bd34c76dd5de8a9f5110b35122841f0. 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/c8381592-708d-4f7b-b119-bc7cb50b846b.json and https://artists.proofprofile.net/proofs/artist/c8381592-708d-4f7b-b119-bc7cb50b846b.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 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 0x981f4fa64de028e5cda572b4e9d21805ef6b12dc2b69c131a577c823757ddbb5. 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/QZTAU2546021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354d595e01a9910a8e6fbbe0a4e746380dcb87cd688c9a847c171f4c31a57fa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAU2546022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e3fa68efae28a0ecbbd91da8b884c8d54be9579802e8dbac0ac522d77c374f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAU2546084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fcac0baad75d7c8eb7012910e004688cb44c6705cea1d94adb463a24d04865. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAU2546085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aeb17cfcaf2cf242f052b36f34f0689388c128b25b089271e98da5b752916b. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAU2546086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b1c274d30c9ff901e89a306ccf22100afb1afaf34cf7a59c9c320a4f19d10. 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/QZTAU2545952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9826619e6dbf1b53140b761bb091da5e3c336d72a86fabdb691fb5acf53c979. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAU2545953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe4ef588de655406d2e632c75cea5e57208ba46e36bc2cd8e34da42cbb78c98. 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/QZTAU2546185.
MY NAME IS TUNG TUNG TUNG SAHUR - SPED UP
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7783906e6a851de1111c06d9c364ca64b83aefa30e2078fb52511d1eba8fb7. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAU2546186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbe94126d70d115c339d4b12dac41fae7ebc29b1822f99468c90849a795e986. 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/QZTAU2545968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49507b2306924489e25b556f5ccdd6f35d563136cd104a4e0e489ad92fbded5. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAU2545969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3dca04118ec67cd0bf10f315ea718cf7e1503d7df418ed36b2a868b659296f. 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/QZTAU2546039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe515a6aa60e396ce5d394c9df2633d7b6633a41bcb52773f003dc64bb3aa17a9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAU2546040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e00747a4a86c110d579b2dbc3c14cb6b045806d55c4e0ed15c1bf9928cb95. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB32542223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368718c13e551c9c117835db119103f422781662bd0639d40aa284bff92ed3bb. 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/QZTB32542224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce53a5af4cb05c01046099ec3071dace1368fbddaacf14192ee576ea2e73b37. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTB32542225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b2a6eb416ecf86ab2446ac88ffda2f73f77cf8f3d59192c1423b13c24596b5. 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/QZTB32544352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03e46918aac60bd8d0e6b02369a2c8bbdb6f82f2a4d0d8257b954578aca5c1e. 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/QZTB32544353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad076e1ed63b11bcb25c4868f50b5ed34d6b4d93eff2b425c4d51ee1404ee6f. 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/QZTB52558597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eaa2f19828df18114bdf9511be96b0633db7c68a4fbd77a97c8dd6196e3bd0. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZTB52558598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a859729190054922c2544ed4207c3fe8b2132a1e9e32dbe31adde2c4ad8a668. 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/QZTB82541263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c30ff1b276e97a83101e366dc4164d009fb8c66f27b594516c56b612b9b8b5. 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/QZTB82541264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4c3117fc9647bb117a84b5bebd84044a858df73f4a7e4459b68907f1271f8. 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/QZTBC2586074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8863a0306e9c7829f6ac686c4b07c5f14ceb201ad654f0e4e92e8f77c28d0db. 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/QZTBC2586075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4d8e9ad81c1c07d1df2a4c390b18437e0581c73650bd128026097f0fa644cd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBF2583880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8735fae22d87f726cf600663ea67e21108e1417c6976173f8478dd0530c5900. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBF2583881.