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 0x1b0a5f94882f218b0091aa57937335badf112f18acf545e687223b8679ba0171. 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/1be30fe4-60af-4c99-9ce0-c77b30604ca9.json and https://artists.proofprofile.net/proofs/artist/1be30fe4-60af-4c99-9ce0-c77b30604ca9.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 0xb07c966afc54553d58ae716df26af0b299376fd34c0641fdfea9072eedacccfd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM22406658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da1d38c6f97ffff5cda72f789a9e5d92af7b5e2329b5aee16814d89c673dfca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY42306617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb503891d2f4e6c671af78f001ddf2c8f1169ce9f47a3f4e5350684cb15e876. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP52482263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6ed973aa4da831353ebbce98c5b9d4a808c7e219b12f3e14e1e82caef93852. 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/QZHNC2414643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3d215fa98b313b6aef50a81b3dc2384e92dbcb36276d7e9ad07b9b8911674e. 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/QZHN42417665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c771f90de28b0502b415568b630a94d1e20b64294f58e66d9a0fdfa091cbb00. 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/QZWFL2357626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae9e129cb8e8d62e5251edeb5f6fd1180565c03bf05a39f408efd70533d0597. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFH2394773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51b7259316f21917beb08f9f1d602308665f51be3feda45ed09e5108402410a. 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/QZTBA2396341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b06276b6a8f16ff71ce5bdf9ce4ca5eee5bb5f51360c79efe8939ed6d3b05. 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/QZTAU2328778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aa2c2ccfc2cdb465fab0caa3f2160e35459101cf492e8512e428d7261ddcd7. 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/QZK6G2321223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2643d1effcbbcfa152ec8043e0ce24f89a249b01f7517fcbf7833af3912676d6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLS2251786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec967f487d7d57b0deb6104f65d16c129da5ace833cfa2d0dcab060d4c5f7a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2252222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6c977b8741b1d2509008aec1a45da308f8e57436e2c50df755dcaa71a0beef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2255478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328cbb6aeccfade3a67082511ff16fad33f6550e703929b2ef7dad2189258d28. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNA2267640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a8e8c2a062030a990051b8f86d9a835b088cb296329e27a370b5108b73d092. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA52295910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0933f58ed955c9583b7edbc1ed13b5a86e9b5d2a7ff200102fec2aaa4687a9b1. 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/QZDA42244019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eef34c908718784ad84906cf112cff9b1b275081cb92c0315e55b3ca2483233. 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/QMDA72221756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11afcf925a4479e27e6c49ab7a2823c1eee0d54e965b2250bcc6b9ff5b11358c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2430119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e49cdaf08dabe0cbbec5946e6bd6769d637318440b50523d2c0206d098b494. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USL4Q2291266.
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