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 0x4cc0cb1c22190fbc016516f9e9308922af29d2cbb551881faa4c34f0abea26b0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/048f798b-08a5-4b3f-a842-14c7d87a357a.json and https://artists.proofprofile.net/proofs/artist/048f798b-08a5-4b3f-a842-14c7d87a357a.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 0x29590d2a5d26478998082d05844f1279fc9d7abcad9a15588e9277c782f9bccb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ESA122400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a10cb343f1834d513baa82da688321dd3e54f328cd24aed9909e713aa621f4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ESA122400544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2150d3c3f853b64a315fa9414ef55a0548a2bb954b4120c773dbdbb6cfbe2855. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ESA122400546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac19ffd14e5630def817ff7cfdcaf093cb9c9baff11475cb3947ad579801f904. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:54:14Z), 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/ESA122400547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa800b160900f2b88d54e5dabc05fb362727eeef757c5b4581920695e27b2fe49. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ESA122400551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49719e5da47c6a5c8a561fe5ca477c649ee61ce7def2ea5bb368274febba6403. 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/ESA122400553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e40e265db30c2bb14b3c8759bc2d3dd72f6f86da738f0db667a0c30f75c03a3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ESA122400555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836cd4741bc544a96741bbbf853dd39d741ae7113373d4a0add4f26170678165. 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/ESA122400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a45f4ed6b9b47ebb7bbfe6353dd1f0bad3957a4c1b7c277c8970616b09d5a9. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ESA122400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa23faf8dc4c2a9d18eacf93ec6fad03aa30f2b20de18e453693a83f2c35fdd3. 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/ESA122400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ff9b011ce38f24b252999ca11a7588aaeb15e0a2c04e8b010da77b8dbab4f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ESA122400562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292850579f7edbafa1e250219f3ad6b6255e03112edf6a86b9d62c6fa31fcf9e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ESA122400565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b5fd1af7f3ba6ea9f9c0fa111bcaf4d31163fb219333088df1f051e4ceb4c6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ESA122400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40c21f02304f08452b888f7d9cec1a4d191daa69cc1eee7b9201e5422fd69ec. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/ESA122400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e077d165c339aaea652ebae07c9389f343159e9bba71674421aa8c2079a3a2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA122400570.