Breton most often refers to: anything associated with Brittany, and generally Breton people Breton language, a Southwestern Brittonic Celtic language of the Indo-European language family, spoken in B
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 0x6b99f4af885a76d23a4bb52eb5707684edbffa46dae9d90fe8797a288d428e73. 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/be2633ca-84da-467d-a224-b6d55a8ea21a.json and https://artists.proofprofile.net/proofs/artist/be2633ca-84da-467d-a224-b6d55a8ea21a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Edward the Confessor / Kensington System
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 0xb29d8e939cf961ec1585955de5d604116a48232fe2e79096238b95e5797d259f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:35Z), 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/GBDCA1102040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d2dbf1fd31e4b42804049ed162affb9194ad60dbd9362aad1f98c1db11430. 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/GBDCA1102024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5a1717b04c03d2dbb7515cf506bcfeca35efb5061d15b0270a4415a5dafd6c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBDCA1102025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff52b43f168cb5ed8c63e8709c7912abda58efec7ed22beb0e42ddb253ecc10. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:26:42Z), 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/GBDCA1102027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24101038339161d2e1997ded8aedf15d470eddc5ae66ea90eedff7bda055e64. 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/GBDCA1102029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010c48a6f48b19ddceb400ffc62f5416a5d1e655dd643a97dae7b935efc427d0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:57Z), 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/GBDCA1102030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0064237cc6f1990be5a0be1a6f9f886887cc0a9404845e6814a7733ca7dab435. 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/GBDCA1102033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8cbbfaa33d4f9122151a3a1cd65dacdd3777a4bcf9c6b7b17eb63a079d12f1. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:37:10Z), 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/GB45A1300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6389fb6bd1f213270997ea38921685f0f88446ba766a519c042b171e9673400. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/GB45A1300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100b71bb185870d0181b5b3ec07020cf63543d416ae8a69639927492bd0c58aa. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GB45A1300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fe3d6bc02b95a9c1dc331591e27e09494c045d4984bfb6ba865d911dfe3080. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GB45A1300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac97a2fe8dd600a7d1bda8519486929594b56624e6cc581a443241e1134eb56. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GB45A1300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaad997f926beebacdec3f679a3dd70fe377d8b7a2dca3d5a4a475689135eeb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GB45A1300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8962172c09421caad54d3fa95bdbfd9b88f83a85d9c2bfc2d27b12fcee8efbc2. 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/GB45A1300032.