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 0x035b771100fa7c75d1ef825dfd890cc3dd7da46f7fd2477cfd58bb1fa59fa154. 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/ef1b4d46-51f5-47a8-a4c4-7c0dc8b40603.json and https://artists.proofprofile.net/proofs/artist/ef1b4d46-51f5-47a8-a4c4-7c0dc8b40603.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 0xcd11559414131a5ce0719649acf549ab82a084977f0c6c579d8728df8a2cd4e2. 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/QZHN31997259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b8e42b8766dde8302bb1bd007f41f8d6fa14a640af9edad67656260df3292d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZMEN2024788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a5a8dbd96978224802d5219361cc6745e44aea86646ee5e40b1fa9fc0dd584. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:43Z), 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/QZDA52169049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61146130132bd5747638c367569224a846fb325b96dbc658bb0ec91eb2edcbac. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZHZ42246487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8449f27c76492f10733766bcbdbfc6d3978fe8b129512c134d331a4f85d70dea. 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/QZHZ52298453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3b210976eb9604f458d4417916537a49aad5f3f1dfe93292b1b5b94c761722. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHZ52298454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d46e7b82cc696c67937f9f54372f0c67401d31ad7891cf9f7b601d7f5caf6c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:10Z), 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/QZHZ52298457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4014cb393fa74352a679fe483d8b1e126542e077806f89074886d40ddabdc28. 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/QZHN42166296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2997427e372aa98f420447f4a1291bf0b65643f28bbe9a279afad601cbe1e545. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZGLS2270949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea20c147d1ae02ea46ea722e198ba78e0b1518395ceb35c8d5dff260f82d624. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHZ52298465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610667bfdaab6d0cd667bdf42559ac04c2361dbc9972055b8a2c1f41529def31. 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/QZW9K2277236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276dcf312dceb1883a4647530dd3275cfb30eccfbd6782235a04aaf86fcceae7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:32:07Z), 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/QZW9K2277237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee8f4c9c1a91177a1d830651fe96e16ca6e875ef07a098f3a7bfd8c6805a5e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:42Z), 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/QZW9K2277239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78898a9e1852c77caa5b837508d5566548feec2f1fd85fdd63aa62d8395bbccd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZGLM2379975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72042b273144e66c2c8911f1a55a478cd17e1ee78cdd9083f10e21538244d00c. 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/QZHN42549985.