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 0x9ab7ad5d66e80ecbb33947d51b0b1067b3164359a565affd9c884683c3eb50f9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/529d538b-9e1e-444f-84af-807d2945ab1d.json and https://artists.proofprofile.net/proofs/artist/529d538b-9e1e-444f-84af-807d2945ab1d.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 0x875f2c0780c1d5cb775443168e0d842c4a6a7565850fa6a6b67bd469d691f53c. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZKDK2171939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb694999ad8021ea7bbf622d294f7bd0442f0a0647790a53a4d2433718003c7c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMHL2071390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0acc9b2fbc8cb6f3bbe729e1f76a06d69fdbeea07c94c508ceb0536bdc0c20. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6Q2132128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64e29948e753eba23f59b7e47f0dce7a034b37e3913a2204ddc26813110efde. 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/QZK6Q2166992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462de2ba75f5aacad919da12cfc1f7394c71c974590c66d7a9ece77fe7ecf1c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM42K2250043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044ac222374491216f219596079e55e48dc74f8e09c846b62b82d322d7755959. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:05Z), 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/FRX762294326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee3c1b258f881cfe3ba0bf06b126b939737d43904be545f532b02bc96003fd. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/TCAGN2269138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecea973fd2ee1bef875b2ca9ea2040bf90c4ab25e1752d6a32d3eb9ad1e8f0e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB62288727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19b86ea7f155e337134c953905dbc9155d367fdd00517316c19c7681bfbc1c5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAHG2382909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef840648148f680f5d471458b285259ec50942a7b7589b7aba9ca5267c7821aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMG2323492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368c9280d186ff81c173fdbe19cf53c6b79179deb7d381c8c318bea5f143d1ff. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TW2472334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c028ce8ae14ea3b7c75818a42d8a64adaa30888484ec5beda9a4a6dd44c558. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2489271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddea66f773b0f67e5cf9b0563af614f245c7fae9b7c8167df885b13a8f88f99. 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/QM6N22433488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724ba14ebc6c87a3dd1b18de963d6158236f6fc0b5d766eff49c4610bd110e3b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P42416271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65f8cc61acd042869ecc2c333ef49740c288792c3e46a4a082b42d93fbde580. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6P42416272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9f12e4007f9ee903447a10c0d49a75d7a3e2fd0055f67a19aa0d4503e7ecde. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMBZ92404702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8aa7ab6c0481d556d2fcd7aedc5c9769dc7ce2575cd5fe78792aa85ff4900b3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/AMA0H2400381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c43347cc40c8656f8a773e7226da379896872e9aee0a3290f11287c3b045fe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:36Z), 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/QM6MZ2514615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4160f99d34871b1413395cd59677436ed941fbd208cafa58664191e9334bc95. 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/TCAFL2139129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5736cae5cb6810fbf045b145e38360fdb0656f9c7ec13fe124b1dfcf167483df. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US3DF2089524.
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 0x1be51eb28b2d6371f73e5e77c50bd992dcc67151bb60d9cc4a3ec15f8ce8dc4d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US3DF2089529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f22f5d5ecc222f8a490a956b59c0a648bdfecabed1dafba7ab113a9ddd6540. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAFQ2133453.