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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84e9e786f5b2c417d5658dc2b3e311b4e558c3d2c223a03934a8e3546c53031. 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/84a0c46c-69cc-4ca1-b5ea-b3e2bb25dee2.json and https://artists.proofprofile.net/proofs/artist/84a0c46c-69cc-4ca1-b5ea-b3e2bb25dee2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e28c5788f653a22d9f2732abffba4c9db0784551ac3c3ec6a20c9d1cdfabd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ41958955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26ad2e59405dd28714fc2242d974a9fa040f1afe062a80e5ac2fe44f24540c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92315379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b557a1b1b55d8578f27ca9144ebda0c81e87c8e2e287f7016fa2844d97e9e8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9L2330245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bb72946c72efaf765fa4d91db95c45dfd57a9429e9a305b67a0653ca779624. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWDE2333848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6205fd9e82710e3204140eed58c8dc576655a860efe47d8d9fd583590b05bfb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJY2386540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1badc6eb59df63755edbefaa8f5eddfbbdc6ed617e797bc64b2800225ad3b05. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2370547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179edef392a72acc8a6c06b264d350f12ba09d16547156a773d46b4e3b278795. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2207317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e1212258a608fb5e22dabe6168bca3f010786f81006690406289c2ac2a558c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMZ92148884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703ea3bf7ec3fdfadda30bf842b7b499273348b7c170ac4159475e3d0ff6f8e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ42127205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb697aa82235c371cecfa1bee2db8d644c828f9285965e9bb016b4d755d9a4583. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCAOX2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c3206940058fa3b3efc4e1082a69eba2e9dff3bf3b44830c5a5b4142a9a414. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCAOX2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8fd39a0c05a7aa41fd899eefba7d3906d013e05faa68a5c716eb68354fd6b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2001433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87364a07e27bc9d568f40fba40df941445951f347fc2cd779f8f9716ab05e94e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2008815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd3d2ec652929de6cb37bedb55271866a2c889eaa00a58e98d27b013fee0f7a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ51902896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb96e32f230d48eed1f7a36b999fbae5eca4f86511d94fe37df84f148aebb552. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ31974739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf1c11285af17a5ac5876e08dc1fb1ae12785f9e77f1fec4e5e1ff480b85c7d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM1998918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4e859d53eea861e073048f3feeac42c8c89145e1b64a7729bdd71cb3522b96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436378cac6e98f6b8f90b4f00d0d4dffdb682d95e5beed057af2535ee5130fa4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc82e474f2c0dcc752169da543192d5227992401e4f9c0c797d32052e0d52bba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXG6R2400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bb72946c72efaf765fa4d91db95c45dfd57a9429e9a305b67a0653ca779624. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDE2333848.