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 0x14ce0abfca28014f91eb67a36f09df3d8beace2ee1b30262d20fd95b5999812d. 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/2c6e27a8-dffb-425a-a648-d5fdbe36767f.json and https://artists.proofprofile.net/proofs/artist/2c6e27a8-dffb-425a-a648-d5fdbe36767f.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 0x6b7a98c9ae37ada580916b831f60e1280937eb2469a84c07192aa9d077ca6112. 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/QZTBB2494701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d968f41e63354147fa8a71519c3a90078eb9b6dd1fb53410fac2d6c72814bd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTBE2446136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a873c25b3b7cd40f736b93aa66229cde3d934de7800693a297e4bae674755a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBE2446137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a6123c6a39616f04d1fe934ae384edfbe972f5616a944813c05b0dac1ebf58. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBE2446138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc29cae9a0106e2a7d661ad4bc2a53871928767f0810b5b40f7a9a830bba62bd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFT2422846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0229241e583b31e491700227a0ee1fab0cacfbfc7b995ca589fca5a87ffbbe47. 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/QZWFT2422847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4668f3b057eb7c1c7316ef7592e252c30bd4f15b157b5062a5b4180d5a6b5a9e. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZWFT2422848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ceb66d3a3f20336df582e281d89198164c56e1efe2b35e109144e49897f200. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:36Z), 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/QZWFT2422849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c7b7960e1190aa6b5474107db24dbc02325aa6039384432c09fb26ea903e27. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZZ7X2402305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a06823b056ab0e167e73644216eb1c59b30ca3b175f4c24c81d40c78dd2ca6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7X2402306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb520a8685d863e2492dd0c4967fb70a8c7bc53cc6f313508c847d575aee99dbf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7X2402307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166334483f5d3775ea799c68d7bcfae8258974b52ad6cda8fdd019089ea57835. 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/QZZ7X2402308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd938e02f6f2169aac1f36e2a20cb0d302fed91935926d3f6a4a5edf48a3b3e3. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/QZZ7X2402309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13b7d04ff6f3222ae39e4f96f03c129ca5d8fdcc78d9c1c091e902cf3bb8e85. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZZ7X2402310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825024046b0ee225657304ccce2dcd8168369de9ecff9354fa248f016b1bd56b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7X2402311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d44d3f65cea1d6442b95424bfa3ac17fb078bab514027cc28184ba94b8ae5d9. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/QZK6P2571141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66857a276bf9a5d87e3f1e67469467b6a00f4a5c09fba32a158bf9cb14b2632. 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/QZK6P2571142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808064f738d5eba0ac967a9dd4431444bbd20bd156fd9321fb8b61a852b946ae. 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/QZK6P2571143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1297b6a56b4e41ca5cde4181d859ead58507974d576c1f888d4d7742a1651b0f. 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/QZK6P2571144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9c1854bbdbfee4ffed5aba14a5fd70116d7342e1915ff5c9debd358c7d7540. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:58Z), 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/QZK6P2571145.