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 0xf4b27d97f7b87bb4b532af82bec30e3188ee01b3f6274e352d174cd634ae7d5f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/548a793d-9b25-43a2-a9a4-ed5a0d9c8ed3.json and https://artists.proofprofile.net/proofs/artist/548a793d-9b25-43a2-a9a4-ed5a0d9c8ed3.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 0x3b0fce0b0229ed9e3717a4fd96f3e7dd281d80dd9e7dac661c67c197a2f4ed38. 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/QZFYZ2277418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c82481c6658da9696fd2f81bb410fababbd3b6ba411065cb5e18d534ab3a2. 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/AUA002200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6478a74cfff085b6006a1b12e7363abc8387d706efdd2a119dd31c26cdc067ac. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZFYX2180173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed64da7afb825e9a2c301f3fa28d15445f26aa22009e930e88143b3d3d870ca2. 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/AUK3X2301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cbd53971b5cdfe10d781142ce716cf4f1ce390c50ac8db9ed89354ce358aaa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFZ22418658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df0b598e4d2e989ebffb8c75ec77104e9825b525d8deccc03fd3458899013d0. 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/QZFZ22418659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd406d41df92eeb414eedaf31fe074e553b755be455938f2f8b807dc3b43abab0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZFZ22418661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a18d356aec4834948c11e154da6eb342d1522057ebd8202384a63436660b9c. 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/QZFZ22418663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741d21b79c427149251187e42264fff201a8ae33d698cd0151ef1542ebb69969. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFZ22418664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00bc7be363b4a9419c8814e6a0d02e765412dcd19323ed9e9cfa0e6bde3a16b. 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/QZFZ22443779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce32aaf72a2643c109cae28cd366fc246d16addb146e3aebc33da02711038f33. 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/AUK3X2401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf49335000f570ff1e26c9f0006d8fd6bb28929b0266422d16cdd45602ee0f50. 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/AUK3X2401232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29561930c1430741a172d05082dcdd7f74e52546aeb1be86db91ffebc2b4a931. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUK3X2401233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4f22fc86a1fb9ed8ad7f784655a0a76ada069870b2f50c5cb002c23c293004. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/AUK3X2401234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ec1b1cb105b48cb9b19821565447fa6a284e3e359eff552501bc7a4549d22b. 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/QZNWR2179339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5827333721585db97e29e237ac340b3c9414349693bbcbc58686940d85f59bcd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZNWR2179340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f83673846e6841c93569976a0464b5156e5f05da57fc84dd84b446697ced14. 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/AUA002301076.