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 0xb79f07f184e587364ec4d282f59f657124a1e128e0f69d98a02de931132845ae. 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/63d1a168-5e95-483d-95c1-81c964b1e727.json and https://artists.proofprofile.net/proofs/artist/63d1a168-5e95-483d-95c1-81c964b1e727.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 0x37531fd5b3e29a4acf1f1afa78c66f5e8f13efa7dc767dde2e992d5df4231e54. 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/DEVK42000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ce93e5f32965b79b4004943751d52f84ba1f72fcfc5a52840a52109ad34adc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IL6432200753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4087da403db8de42e347f2db2cca6aa17dedd08b3d8b020664fb8e3c48af9b. 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/IL6652306958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432ba1191a35d0eea2bf9cc73273756aa072c0b8e981488f073f0ebf750a920f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZWFL2318997.
Affirmation Song - Rien Qui M'arréte (Re-edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a719fb92b3592f5696b83dc5b811f60b6c9776c14dc8dc0f95ed19d36b6b3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZYFZ2427855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ae673f984fe6eb2b69515d3e77e90ac2bdc204ef0f557f4ba01134b2191ad. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWDW2473067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa1bf79d9de411bb33accb118a98727500e2b8db42b3aed94eee992369a40f3. 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/QZWDW2473069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff795c9ed95e1858903f652083b4b0be3c6f7f11262f5a4b09997dc242a1ac9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZWDW2473070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bd1297d3ae85791b0f4e590063dce0a4d912de7e91c39e3ce2867bb4092dae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZN882500877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe77f8c576698b8e51aa36f3fbea6b16cf2952f0321b2e4170f9d68877bc9a1. 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/IL6432200745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed847b326faedea8e85e5bcedb4d556696ca0221ab0f24a6bad5a4671506cd. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZRP52268806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50460b6d0ea3fda469a95b5dc75b3f58b95e0cedf1150d92142e04a76039535a. 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/QZWDW2569931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37531fd5b3e29a4acf1f1afa78c66f5e8f13efa7dc767dde2e992d5df4231e54. 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/DEVK42000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ce93e5f32965b79b4004943751d52f84ba1f72fcfc5a52840a52109ad34adc. 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/IL6432200753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a719fb92b3592f5696b83dc5b811f60b6c9776c14dc8dc0f95ed19d36b6b3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZYFZ2427855.