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 0x3244334d89bc8ae9ea4d5337d3b9284cb16533b4c93796acf0afa6bde700de63. 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/e023cf13-f08a-415f-b2e4-8201d061d69d.json and https://artists.proofprofile.net/proofs/artist/e023cf13-f08a-415f-b2e4-8201d061d69d.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 0x371ab6fcf28df06d0b4bb0c1ef7c59b1db75a6623a2e22cefaf767475688c685. 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/QZTB32339258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa81826a96bac53b6ad79f2d8bba32bcd4ee06bdaf4d5d325871364e7e5033. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZK6Q2452031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb616dcd55c19e0bb833b9afb57a4906bfb42cbb738df8ea399052082558da100. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTB32416515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff51fcff539f994878c1c8fd54b0316dd7540aee72b6f8784d8da6f59cf4535. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZTBB2435893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa650d894d0bda681eb455305550eb2394241e205a67f73a8ec1dd1de51d2ef6e. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZTBC2482421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed201517aeb6ca8bca96ba113bf473c753a244dd073ec8c139ad293bfa8e2fa1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFE2431962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b2010a4e065aac62a32f051a05cfc56064f448986256e8909e0b1b98a69a60. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:54:31Z), 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/QZWFK2434717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2c6f9c4d0e30fd1a718be8e46a9506a66dc8fa76917e6fda8c8597c7e1ed44. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFP2446430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949e98ebb7f9528927809782baac16d739fefb74fba69b00682b044c79420cf. 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/QZZ7N2488467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686a87f7791c35fc38f838494933cac3f3c3de52f2a019f62d2d0edb4887a816. 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/QZZ7X2475850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aacf419dde8ff0b399c8791972c9351c9cac7258e20ceade5fe994479649f0b. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZFYX2537785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ec9355224f18cac04f57f6adfc888fac168e4f24e44e80ba192fca1045aeb7. 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/QZFZ32586855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eff3ad5eb01c2f0e28bd6c97e513f3d9de24fab01ec41a3359496475be3fee. 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/QZDA42547363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c20be92ae5363930fe7bc703ec9db05e25276de35813ea4a6c4feec64e9122. 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/QZDA82590882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c76f089c40995831f8a599ceba63f56417b9b323a442bdb46c87a01163eaec. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZES52576064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b21215db9093d47ca18e3b920fd2c4823de77b182c9cd33f9b532fd8f587e4a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:57:30Z), 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/QZK6L2560433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3298305d1481c0e9b4a354df734939bb4701f53d1efeff47e4ae2e79bb86e9d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:44Z), 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/QZMEQ2572515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c9fc7b533fbbb99439af38b23e4165eafac75cf134a5587b025b411b5fbf27. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:04:23Z), 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/QZRP52506502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f89c58fe3361f762cc2366393885119549c13bcf771f798588767ff84649427. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTB52592625.