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 0x5ad4f87fce6a9e1a055f6be920da8f11b98e6333cac1813f0e19a3e00a9926ec. 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/faad56bf-84c3-4276-9e5a-c9ff22159c88.json and https://artists.proofprofile.net/proofs/artist/faad56bf-84c3-4276-9e5a-c9ff22159c88.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 0xd9f2926aa3a486b3a6c6613e525207d8031cbda5f19a77f609070413fa2576e6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM42K1706387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a39a730c604b733b79f600d67d9abd94a8ffb263e92702617c9da2f43f556b1. 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/QM42K1759656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805b54c1dcc0af82519bf91fdc6190f7e396f2c4e45906e2b23f61ed6bb31da4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADG1712420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3ac60810b1246c0c7904e172e74c87be8d8eb38daadd891dabf9bca21a1e1c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QM24S1805145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee98f2e06c400d3865f0d1fcf71dcd6f74fadbcdc9d31f686aa6ebd508d1b0f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM24S1831130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5342c2e650a29ee02aed988f834ecde0d865dccd2ff09a783166e8f3b18453. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN41941826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1682b062463e3170140fa6c1f7421c153fca7b5558487407093a7d2a84536450. 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/CAKHO1911561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebae5357c90e881ecf38a145e44743b67ccfe4142bfe5d2791d8157e4ca9527. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZS652180625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7210464655e3a17daf1ce14298f084f42ab1d3a3fb4547296978bed853be74. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2362446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b7e215bdfba0a47727214575b9bebc207aafe67b3da4975587d85004717025. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:46:44Z), 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/QZTB62367200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58774e2c14f4148b7867921bf01854002ef3d186637f233b241c15fe6f9344be. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBKQU2490620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2383bfa3510ee7ea7ddbef3084fd31b3a176ba842b70f6fef5d6097e0a6eb6. 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/GBLV62421112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4837859331aa3ef3e1d2c4f7eeafad27435153141a690015b79177ba0e33310b. 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/QM24S1802862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ad884c9f9aae4784998a86f2487b79b566afcd2e8bf64250a668ce966502a8. 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/TCADY1880315.