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 0xb94df362b6c5cabc7d58129d0fda733f939da4f57c941a6d7ae602d43e314141. 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/6bc96810-82d9-42dc-a81e-a852c52b3451.json and https://artists.proofprofile.net/proofs/artist/6bc96810-82d9-42dc-a81e-a852c52b3451.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 0x03eadab98693c5fd45050f6460d04591da0e8623ebc09a0274ace8fc74164bd8. 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/GBSMU3959909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db7773cbd93b4365b11a1ebb23cf70731b821bbf1b593fdb183b6bd2a2f2598. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/ARDEX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197a264455a73e6b7305036ea34dd7a5a67399048e746bc99625f83844aa721f. 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/ARDEX2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824f07bc8c7e09405ff4ea85db3b424e6d081203fcf5ab0155b6397af20fbe85. 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/ARDEX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307119af908262ea5be80bca42a8111478e827216b4937a94ae51468cff0dfae. 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/ARDEX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d446f6f761b2597e7bc232bc62ba96d33c26f570ecbf5246a870438dcb945f7. 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/ARDEX2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa586979341b4040340cd1a5fcc9cca7e52f606aa126a7a7c7dadbe8c220027bc. 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/ARDEX2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d2ff7302bd11f4bbed065a0e8a27aca80e0a6af05ef2710afa63200297258. 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/ARDEX2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9943c988096d480c29cda8f3845650a090e16dcda5aacddab852b7a93cbdf5. 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/ARDEX2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06139178418a36ceb44b4017c266984d0d3568c60942376c8aa1deb9dbb7c2d3. 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/ARDEX2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f15047b2af83d0673e3f12542aaebaab43c18a2480c32dd8a675fbbe4b2dab. 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/ARDEX2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c26c4c825241b10fd15c00878501a2a185f40925390495511abe220af4cf24. 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/ARDEX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6e858d1e343cf0fa082b319e7f7bcc9a0eb74953a97c70ac7966a62ebf2025. 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/ARDEX2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307119af908262ea5be80bca42a8111478e827216b4937a94ae51468cff0dfae. 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/ARDEX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09102c6e4ddbdb91ed8f6120ea5974d365fa2edb47ab16ce320706a5d9cec3c8. 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/ARDEX2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1a1aca0da8ce94f1200e00318d41883b090e722b0004e95b22fc71398c212f. 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/ARDEX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824f07bc8c7e09405ff4ea85db3b424e6d081203fcf5ab0155b6397af20fbe85. 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/ARDEX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8b583affe80f1ed1f96054d3ba1810cf512ca1769756257a5f6d70d4edf257. 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/ARDEX2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5319358c1e7bacd79c3777ae6d913b3b5faed80340073f5b4669ccd4b227430. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ARR4B2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee7d844fa86283bdf8226966c9c730da1e6561ea830eb51e8b7b902fc4dc82. 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/QZHZ32143094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b30f7827d55fe074282a803fbf45c259cce649003c7a47fc02816add38760. 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/QZHZ32143093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65092b9a9cdb85eab6a74ace321b4530f4e7042e3d6d7b31bf93ba162361319. 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/QZHZ32143095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae09f3c174e040f88504c7f8be25e6846f284597fbd9bd1e58789d4dede36dd. 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/QZHZ32143096.