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 0xabcae5531a3e2f1ab1d15df9b56faea24d0891abfc6082d0957ad732c6e5d62c. 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/40a04154-8605-4228-8be8-b6bf62d8ceed.json and https://artists.proofprofile.net/proofs/artist/40a04154-8605-4228-8be8-b6bf62d8ceed.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 0x6da7808dfbeb39f88a923b04087e205eaf96f4e1d8544afdd93a3402028500ff. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE62M2254308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf73e98e1fafab32999c4421498a7838e199a5b167a11b915e15b6ebd24e93ff. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:53Z), 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/QZWFV2449414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc8b3270485dea42889706d96fcda50e49ed965fe7b649667207df5dfddbca7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:51Z), 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/QZWFV2449412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b16e2092e8cc814e9e3060d7b75f9cd080d1d5dc88b995497c3e1f6e813564. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZWFW2429121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d1412fcbb8ce86816ad81b2fe7a935fbd41df2f672fdcae09ca20ed58f2643. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ7T2469690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4778554bcd085609862d64f1422dc2d6811e8de4ab1ea3099e8263f5773d130. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:31Z), 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/FRX452545238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380152a454d09f824be80d32fced1635b358339e691205484812a0c461a4672. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3F22542819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28742a374ed1e964ff9271e25cd006a89542dcaffdb95aa5fd592a444e7fefa2. 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/QT3F22542820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879aaa44769c82ada0a2159b6e317e4204382ab66f409ffd534e0060328837c9. 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/QT3F22542821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ad408530923352c5ed71e8fc320db371b56a4b5147e4c262d7a89e4f73e5cd. 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/QT3F22542822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb6c5ff3cc48b2119f626e4d0fa934fce566b57a7674ea05ebc59c037e68f4d. 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/QT3F22542823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23ba789411f58d030dc61e26110c6ea122f2a59fa3243b883175bb814deb233. 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/QT3F22542824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ac8d281ae9ab539bd1d68493a456ffa117738d5419dd6240cb7fb901929a31. 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/QT3F22542825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fd31a53658fc096fe737fedc68b14403e79012a2c2fe07287fdcc7a3d7b5bc. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QT3F22542826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4092fb003c985f2ee6e708b207fc8697be2a983cd62dbb7ef08cc0130c2c8e7. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QT3F22542827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b7543c95f396ae925ed44387cd9c82ba7e6f8d1796809660261690ddfa6161. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:18Z), 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/QT3F22542828.