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 0x071a9c02e78d7768f83f21b8c6fe62f15b1d80b4ce8d52b2404e9952dd16df8f. 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/de47aaf9-f9f0-4892-a595-c3e4e412b4f9.json and https://artists.proofprofile.net/proofs/artist/de47aaf9-f9f0-4892-a595-c3e4e412b4f9.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 0x2bfa6a1a4acd1d83a150f66483e59a46bc272970a2b26fb7512a4c37736782a3. 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/CH6541745795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d50c1de7fd784c1a2c1582c7f617c0db295e3b5fe109de8e33817d282a6fba9. 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/CH6541745796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca188cc45e7258575c206f7b903fec5af58f7249d88c24ecbfa099dc7bdf1e4. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CH6541807440.
C'est mort (On écoutait XXX tous les deux..)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbcc6314f6e75445067b2fd53bb0e695341a51d8a2ba183d3b95a81bf1d880f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES81901795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5ae4c5e4c8ab4a4bb2564258dc0c90fa7a0d826daa51ac6f364a3a9e245e7a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:39Z), 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/CH6541885254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b86cd5ffb9a2cc1e88dbde61f4bcb8cc045328d9e224408f0a88bed7eda291. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZFYW1955944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48c9677b1c321f37938b9f7cbb2ac40d4d738387bb61e4235bc87445698708c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:17Z), 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/QZFYW1955945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa006d604988459deb03cb231c2ef6a72160191df23f0cb3911de7af643325924. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZES82072032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76de363868af1615e6bfe5cacfe06421387d5006e4a47cdf0d46d6adc78a3c77. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN82009584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf81d14c00b01005276a037949cbb7edadbe662b8e3d9199c6a5d5bf0f862be6. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZMER2055336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c35b67cdab9049bc9d8a4ef80d088a1c1d2b9e47c97021bc6dc15c0a376ca98. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYX2108363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcbc990dc94c2ba7d52001225004981d3f7f1250575dea071f752a7242350ae. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:57Z), 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/QZHNA2192916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7abb23467981e035b32d111d0ae09174f4280bb2247cc0c94e15d5bb60b1727. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:15:01Z), 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/QZFZ72217927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b1d69e21ff48da445ce77ed694b803963c3bedad91e020df48376d6df0855. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:46Z), 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/QZFZ72217928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b255eb3b0c0a1afb7a2fd788c883d5f02a52c4112442d50a7cf2d88ddaf54e3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:16Z), 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/QZTAS2119687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecab570f2e7849ba0591eca0f65a6694308b13c74d2a9e1231283b24ac282ce. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZFZ72217930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75acb44176857a4cbf4a112bf952a1b9abe8c03b5e364004e640eb875f87188. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ72217931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad7fe584639cf08c56d0428676bdc04d5bf40ea6e83512f116b94577ec9a656. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFYX2345153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb1121066f7115f51f1c9f8758cb2dbd8a9f5c207a721b67a05782ac03bcb98. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWT2339400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5b241eb044773c78924938b61c667e65594bc07c17d25a152cd148e6887916. 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/QZK6N2401760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ed6272271b810b9ec77539ddcaae0efdfd4738ad24180885943bd51a21ab4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6N2401761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fc6b41c02e1b8233c798530f1dbcdb2137eee46bf2ee2bb4fb955a4cc8b5d8. 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/QZK6N2401762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619fe4a47f558424589d1c99337c9cf094942c49d158f8cda831d537b79e2362. 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/QZK6N2401763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ca1eb17711aa47c0dc9ca47eb3fc9362c131f3574afe99d827a611ede42a22. 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/QZK6N2401764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dba5ede44ec0cc15c462b2fbcf116ce01fa06df43a392c9ae23ab2089de016. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/QZFZ22526869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8150f50a11d6e1b3010a12f17684b4da3105ac5cb767c78105014696c40477a. 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/QZK6N2401759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad7fe584639cf08c56d0428676bdc04d5bf40ea6e83512f116b94577ec9a656. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:01Z), 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/QZFYX2345153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68c534c59ff5df69994be1c57874b009ba191a731050b89fa786d701ea004cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES71976880.