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 0x392db9150feb3281c8215e1012b90c3d27b4f638293f31d7cbd329c1f72d1ab7. 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/8bdbf9d4-8c0b-45e5-876f-36f91a1f1543.json and https://artists.proofprofile.net/proofs/artist/8bdbf9d4-8c0b-45e5-876f-36f91a1f1543.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 0xe2a99ad438a1551735785d9cdac4906687279c258139ccd366d3ea24a112b1cd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CA5KR1929514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8a06e0c061e91f79656e8e06870ebcf03f71dcfc033ea33958fa158123bc6c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CA5KR1929747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3644ca5fdf8cd44cb6d35c3e93d13c5f4806df05687e4803cb35afee853aa2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2124102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31a42fabed8c8b31e0fbe1508b8139aeb6f2360ac3f6a182e9ada4a9c80e609. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:17:52Z), 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/CAUM82100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464121dca9dece31ec9ed3056d567248c024ff76ab73a2a9a19cd1c582703d9. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZMEQ2267541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cd542007f9bbc374828aea553ef94154d3a9d3b1bcea05d436c71d7aecb36e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMEQ2267542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308882d7fa04a46d674dd530254542d5671abe2498dc8db449d68f99a28b607d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:46Z), 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/CBAUX2311601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bfe565326bf3f13eecaee37cb840bb44932894e1d45aaa93285187792b1d42. 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/CA5KR2420789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ed2f7d0a1f6195ffdaa8be5f63213195b6a0d224f56611988133ebaa4f6e9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:39Z), 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/QZHNC2585984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a7ce2a1de620978b059d719d8ebe631e63c7ed8972f85fea02dd7ea9ee0d2. 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/CA5KR1807226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09a63bb4fcc8ae631dfa76fa534b7bd7a060bcd362afe8d0dac6fcbbcbee111. 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/CA5KR2437466.
Best of Bassrush: 2021 (Mixed by JEANIE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af46d6b3af611c7c779dd5d1bdd1c2766587cc152643388a1bbd217e9b60f5a. 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/CA5KR0033218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c37f1747f815db718476c65ba1f98627a304de2d91d81192c7f3cb9ef091bd6. 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/USDM32004001.