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 0x682394ccbc3743923059a1ee0ee83d4c86872feddc84a1ebbefa7885fca6565b. 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/3e9e14e9-d81e-4a2f-87d8-6045ffc5087e.json and https://artists.proofprofile.net/proofs/artist/3e9e14e9-d81e-4a2f-87d8-6045ffc5087e.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 0xa59fa5bcd204ee4be956ecf4c18b5052d63bbd5b5f102eed6260546737b55c7a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBLFP1598191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc007a3d542afb11d1f594147dc9a45d5ff4ca507c338e17e97bd2bea72ec098. 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/GBLFP1934641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3eed4799b51fc35b3f7914c0ca17b4327ff323ecc534f6dc96238a16f475a7. 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/FRX762181208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc7f1a320d4b7677352bfe58aba57febebbbaef87b45822f548be1e31753ab. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWU2287671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6501fdd72ad1ff4e8497614d08523552fb948c1f40d24a1958360f558473f337. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLN1H1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5b92678068a600287d7f00653dd01453a5603e8fb3e95a0c1004baf21e0f94. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2245967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c18e972d8e12a4c21a00b8da221456b7676758da3785271001a185389e4263. 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/GBKQU2245963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5b92678068a600287d7f00653dd01453a5603e8fb3e95a0c1004baf21e0f94. 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/GBKQU2245967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe163b0dda319f2fec173ba26a3c08213552f2d13ae9ebba7151d151a215119fa. 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/GBKQU2035780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d0c495012d245b77c4bd01af56ee9d7725ffde5784d91eec7fbfc1bcdf5f11. 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/NLN1H1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe372af39afa18ece54576d56513d94e44fd92a6dd86a3eb33cdfaaefa314a1c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKM6J1903828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d586fbf2c44ce17533a984629bcd61334c342627313d41efaf5a85680a589e. 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/UKM6J1903829.
I'm Searching - Kerri's 6:23 Again Vocal Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef06d4285b8ba8483b902890998f6e70f56b37e5250ab3bc5a714c8d03df5f7. 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/GBBXG1800130.
I'm Searching - Kerri's 6:23 Again Dub Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d33a47be5ab76275e2937c73d43f86bccf358a17800e0d11c9497e496ea685. 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/GBBXG1800131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafc225814b4014101a528c2709a1faa52a0d89cc4fc0c079121c8a3faf51b49. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBCPZ1915755.
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
Defected Radio Episode 150 (hosted by Sam Divine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb4339571d9d5a7aaf9bfd26a28809b4bb0b3d013c98e0e08745e467c23289. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBCPZ1915669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09241e10f4a8bf7c5fbacfd11022262980ecb33dbbe7af496b9fbfdf2b931cb0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBXG1800132.