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 0x08386791d203d819a06f3c2c378b3c41acf11957686604fbfc58848cab589583. 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/67272b1b-808e-4c53-8e77-7f418aa5ae40.json and https://artists.proofprofile.net/proofs/artist/67272b1b-808e-4c53-8e77-7f418aa5ae40.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 0x774810e6d5fcb87816f98dc92b904cbace1d958155254d6eaae3d990bcbdd323. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZGLM2146522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60308a7060e3fdedce2337c0d0d499ab2a2e6cf8a5b15ec6c1a1e4b5298ca9e. 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/QZGLS2187775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a54516e4c449bcc3d1d244f6323382f39a99744c273058062ff505769a99b73. 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/QZAAJ2102825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbac3455097aae30c9859094c39918bff4cc7987c53e0b58ee9393f4f577f36c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:02:16Z), 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/QZAAJ2102149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdbf961b911d60c92d8dac1688dd67f0494460cf1da2d2bca01c542ec8f606c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZAAJ2101777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cb617793c4b326044390b58147c338ebc78da677cbf882611e588a88b72264. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SGB502392159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7a03e322d376dad359efc5106691535c5424005ba719bd1062756409ad5de3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZVEM2391838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb554c9e0786a42fbb3a69fa92fe8753612ac2c1efabafc2a9703b53754b2b1d. 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/QZAAJ2102316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f2a488cd283c8c5b0aec252e6fb42f42315e2fe57664eb556db0a7fc7d0a0f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZAAJ2102150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3838edf06daa8936f4352a49ec0aa21a176d2555d20ff0ce3a785329c4802793. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZAAJ2204223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf642db759afb77de9f48674fbfe8b645896b008726875c7dc72022a5528bac3e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZAAJ2204225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c85b877da9d410c7760cba319fab4bbeef55f5fdc00f4db1d7354beb094b1d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZAAJ2205250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8683cf3785714a6f53b3ac79881fb16410ccf561c3b2813fa9eab32d9eaebe. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TLVEM2461179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415026f3f066c2b50628c59873e8df69ec8e27bc8656c1039e0737b727a6ccaf. 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/QZAAJ2205081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665d86ba5ee3ced5894dfd8149292f2a3158b3aa6ce438cbcf9471d9724add0. 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/QM4TX2118955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665d86ba5ee3ced5894dfd8149292f2a3158b3aa6ce438cbcf9471d9724add0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TX2118955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d10441d3e001cad3bb79d366f3fed97b88f1d84baa419959d8a9d969a550c6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N21970229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d10441d3e001cad3bb79d366f3fed97b88f1d84baa419959d8a9d969a550c6. 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/QM6N21970229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859a55eeb189b3511f828dde48b216f0640a6dba4b0b0d0704f5255f3863e8bf. 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/QZAAJ2284222.
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 0xf3df582f2b4325281ea36292cd6fe45f2cb58457c461be7efa04e89f076c1255. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZAAJ2285340.