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 0x4864b1b6fca0de502b56221f21ca564a78786c283ad9b37ae97bae3e0b871091. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8328b6b4-230e-4eb5-9bf5-1252bb1662a2.json and https://artists.proofprofile.net/proofs/artist/8328b6b4-230e-4eb5-9bf5-1252bb1662a2.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 0x364cf57877880aec4d1f1e822b8e82942e6b1ba1c083b89d009d6ac2462893ac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2213521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb75f077df59743b0f52f525a396fe08fa3adc5f3a907e4b576105501a38282. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USANG2233676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1898dc68c39d8d86668b3fbc8fee9afa54be6040ed8ee4a1e7a5ab6b940b3742. 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/NL4WT2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f7d4d1d7b313109284e49acb31c80de8572de8fdc8e71acd0f45ffce648ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM3DF2273071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938d439d24f30e19b1b1f703e45d9c5b2edc953e0344f7f7725b58382c01281b. 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/QZPEW2421171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c28cdc75342faa76cf7022f3ed6163961bb0dad61c599b4192c3e81f38620e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:14Z), 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/QZPEW2421172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869151149f048161030f13762e2c01aa1cf7c09284f68e3f9d65bb91673c6d39. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:43Z), 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/CH7812411958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade637e35390b40ce8be65fccf6a77ef3749db8e2a6504c76d1047c1aa1a12e2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZVEM1880534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a209b42806cd2cc86f10a3282fdabb2e043415f97d7f814fad8ed8bdfec5cc3. 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/AUGBT2536158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3784d317b3f7242630eea9c7c410229fa032f40e6cf99990aae7b56de13ba155. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUGBT2547686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef9d625b11dafdc491d21f82edec8b0f0d39de75dd3b90e4a4b1939504af0d4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUGBT2570840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68355ab933abe55ac0b3a24b12417a197a08abfd7f905920013cccdf1dd42f72. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/AUGBT2570704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaa74f7baf4a099d88d9c466fe29d722f5f298e047528f9b5bb69be688a6a92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZVEM2322464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39248e112d7f0db23304848c1c757ceb198c832e0f214d6cf9dcc7c5a20205f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUMEV2391649.