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 0xfaf968ed90946a3b755a2e85cf18822780f109378aae7d1e59f002fcca48add6. 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/177cb961-cfd7-4f86-ac67-5d796a54f83d.json and https://artists.proofprofile.net/proofs/artist/177cb961-cfd7-4f86-ac67-5d796a54f83d.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 0x4ba0f4d17fa94dc1110c549ed63f9b9e180fa7cb284055386e586be71c7776ac. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/PLA330301256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae035234e44d9817e5b9962c7ec5dafd2f8233b008e58129f11a4eac26d66fb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:45:34Z), 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/PLA330301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7380acf132293c5a868eba4b4677e80c0f7750f40e58c2cbf314fba6251a62ac. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLA330301262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6103c61710630221ba91d151cc0d820e3b691be0c19ce7eb515696b6351264aa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLA330301264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4723dbfcae90d3220b85082091705f5005e97a51b65f47e4ed9498dc2f97531d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:35:53Z), 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/PLA330301181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265b5ff9b610a74bcb501735c9e5fd1e135ab6d66b870b6834a4a874242b395. 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/PLB380600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38b5de8160bbed35b0c0839229400f60583c9bf470cacdec0e551ba92d68f74. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLB380600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff2a237d5f5f57c60f6574f069564810f180f57c7f4a512632d92be38ebe8e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLB380600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e8979e5ac4f619cf0b3e1a02f4d78beca6fc4f51ecdef05d282b4c2d5e15e3. 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/PLA811000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4307b67adc6a65d62db65821b76ca75398080f370ae78a4db11cc0160c1bda6. 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/PLA811000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f18adb71dbf22fe68605c7320bd411234283f46e260c11769a8b0f7f9bb23. 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/PLA811000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b1dbff48746d88fdcfa02a674758be2f401e533975208f1d724efe2ea0c06d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:41Z), 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/PLA811000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac12660036f88394f097090c51eacc2fe10152fbc98841b17b71bb5b2e0da2b. 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/PLA811000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b71a0cd9974b829dac0ec6daeb3612a73f3ccf87ca2056b6312eafcfdc3b1f. 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/PLA811000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd4e50971ab7433b8bae87103af750c29af7b59fd7ab6fdc263802a50a4d043. 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/PLA811000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1bf6c59c9d4e75477ba7d695b6485791429865d163e1e9ba69d5fd34299ca2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PLA811000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd34ec92d164be724c59099aa64d82be922c9738f91f5e0719df734b30e0ea43. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLA811200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271be5752d64db3e597a7afef656c19140266e0164214884c6fa17e3bd99cef5. 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/PLA330200948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea07a99b83bfeed9cda7f1ae9f771c2069940ca332cf5ac57049d3813851d926. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLA330101671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eac8754671819ca3cb477c32283e08396c404d5f96dec12520d1964a91bd303. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLA812380054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d6186747f81991c45579781f692946c44398fb46ada4bf301d58d038b79b4. 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/PLL582100008.
Klassik Lounge Nightflight, Vol. 4 (Compiled by DJ Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bca4aed6411e7a5d82f551a8461c421c7dbb281d51792d4f2f583d11aee251. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEBG61101242.
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