thumb|upright=1.654|One way of mapping terrestrial biomes around the world (excluding Antarctic tundra) A biome ( ) is a distinct geographical region with specific climate, vegetation, animal life, a
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 0x8b9a9e09cac0b37226a288bcbe4717a50d7238a75d2c3c4c7830d1f1b4ec5c19. 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/295cd1d1-7134-47eb-8029-4b6cbdedc6b0.json and https://artists.proofprofile.net/proofs/artist/295cd1d1-7134-47eb-8029-4b6cbdedc6b0.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 0xcd3bcef7404b88541b3a4b683d7f7b38c3c6c7a23af5311803a4b8b6b67a4e7b. 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/GBTHS0900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da24dc043d45a4993a7b6a39cefb3949ea09a3011cc56b8c2db5cfbe252f1f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GB9NK1200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4417ffcbb6076b907a148a2179e9ba8277a290682a150927ac6060ca7455b7. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/PLE351200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59444634cbe18c3e9bffd65d62aaafa02496219b06b6b7a618c30a7121d1e89. 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/PLE351200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ee80fd027721bc491703df0a56de2953d55dbdef5c4a9f1bc99a266ffc4c6a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBE281200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd208b6a10485406260e594793ce9e39513f1bd10ca9179530cc41cd2176d4a49. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBE281301432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a67314af10406d58c295c5cfa34daaa4d8fa2a605ebd0b528ba475afdd89b1d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBE281301433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05664b9069437ac4818a8d646cbf2cd4a882c982113a1a6800ca89c3e02bcf4a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBE281301434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb709ea4eb1a515afbc88691bdd746f530846257a20499a4bc5b35a2aedc7ddb8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBE281301435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020d65d30ce016ac1ea56e874ad56d96f2a78ca4092f8044cf0f1cb8baf2909e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBE281301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bd53e2f2d430bcf884e6be4a48d419d38f4b3762ca7c43c78a869d914d62fa. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBLV62132728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3af265a1d6e6fda191c7b37de5aed2896cfd2f2a2e4a65a7338adb3033e774. 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/GB2DY2200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04db92d64858d75320bf699b01987fef14719efe39c6d7f2836484e2916b490. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GB2DY2200402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393d84f2c9fa1139acc0e7d34eb2f4962174a45bf89fe402764cd1e3a6311720. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBE281200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2416246ba1b2b887e6000541edcd9e1eb27d12c8d85cfc27c36d9aa72ec5958. 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/UKEWB1600350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f74a5640f21d40442df804f57c29a3210fdf99b07433dcc7e64d1354454c99. 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/QZHN42539065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17dc053828b596f8a3f8ff28610005ffc9ff09fb417f9963fd5b3f2059e5ae. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN42539067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b702d0ab825d12e9a9fd7ac74099b2692fbb4d3adc0b06619f0cb124afac615. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBE281201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da950d64771420c39cf92a63d4e66940c8e78cfce71b7eb3cc48775edde74c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GB9Q62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3b76cade345453fad400720baa61d3d7577274955a37ce37bba9ccf3b37fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2348772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ee80fd027721bc491703df0a56de2953d55dbdef5c4a9f1bc99a266ffc4c6a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBE281200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0f81c7caffd5a56e7c723d9ddef9dc8104e93a84682b0c02303b98ccdda62e. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/NLCK41073875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b743b66350f29f9d907536a72bf293c164e1f350aecee3597e15fc1c0bcd82. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBE281200195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24da2e944d6886e45698895179b3a739e8e2ae7edf032a6f178ca6334300b1a. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBE281200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b47c66dc8808dec5e6053daf439db1a809c4fbebed4e29b6e8f0c8e528ec873. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBE281200133.