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 0x4e2fd08c577c743859f2eeec7eb5da6fa45143186846a1f49992c9f106a63e18. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/967216f2-819b-4413-beb3-928d3a0ff9a1.json and https://artists.proofprofile.net/proofs/artist/967216f2-819b-4413-beb3-928d3a0ff9a1.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 0x9bc04eed5f04ce3c32dd12b1fa207d2e3a3dcf65532af63e51588d690682e740. 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/QZHNA2205770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959dd4fd86381cd94ca23bb50b976f00afed9a2d952b1a51a4ab5546f9ef738a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6N2272689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb8919fc4f185383a2f292f8e3b4a6bdec7db86f1c17082c90d5c76c0ec9463. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:18Z), 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/QZK6G2203104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066e745b48b9e398a6c0dd3ddb9231d90a8039ce9e02c26b396d0f313b614fd. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZK6G2203678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4979defc4aec2b8e433c6d4907ebe97c416f62270acd30c5f71b5c0ef5fd56. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMER2281222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02627aa802454659635df0307342b91b6aa248538c70fb666b9f5fe955644f89. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWX2244428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1f6243c47ad336598255e448f1e7ec7322000155266d539842efc3038cf96f. 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/QZTAY2261893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f885097880fb8ae2f74374b1caa0b502ec284a02e99d79531200258f0304561. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA82336004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba23a25e5e50e356dab38092c5742bc85ae9643627f39269b1f943a3e88fa84. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:00Z), 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/QZES62326313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3a52774c12c1db1e9e26c947ebeefa64fd483e2702844918e4559a43503261. 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/QZHN52307018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705c15ec7e98585313430a842c79d1ed2257d56c192586d2e148599e9b017461. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEP2329815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd12991cff32bcd29084966527e9d7e5237d16f4473fe93885f1b90427016c60. 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/QZMEP2329816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76958eac01250497f2a190498b397ed649e4e2edfc628b6214577a384b466c91. 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/QZMEP2329818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3383ace3c0905d824d4a82262c5883b4f4b7e1e68fc07a65cdc2aaa48006903. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTAZ2340884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3767740c93661ec5abf3a5674987aca7b92f502f4962bbc428c6aaf9e4d99a9e. 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/QZTB22319072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e916194668f7805a10b4232c695ebf54206906cb3562ad72d9a47bf04a5d71. 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/QZTB42371989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3938e8a096a73dfc62425c812b3410cc12f62781d7a19fa7524de988025d1ca8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES92427780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40587b1a855320803e3fb8bc8b9a06f09b48a8e45485a5fc1c78082c9f267460. 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/QZWFG2472566.