PDO refer to: Chemistry 1,3-Propanediol, an industrial chemical Palladium(II) oxide (PdO) Polydioxanone, a synthetic polymer Computing PHP Data Objects, a PHP extension that can be used as a dat
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 0x6853edd6b2232794ae49fe9c784ce777b5fbda8c15cf3a01e0369c08eee1a436. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79ef5364-b1a4-4304-95b0-322088dad230.json and https://artists.proofprofile.net/proofs/artist/79ef5364-b1a4-4304-95b0-322088dad230.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 0x2037ab659a6515a6748dda6c9d45e7dc6ebd5d64da2c0787c34f37bf51fefcad. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCACH1514342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c11fcc55bdda34ca33ffe2765e62853e7bf168962f2fb088afdba76a53a10a9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAEU2075916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2719fe01b638f8235a0aa39ad7e7d53fec54f3c4059ca948d4d33b4e4939154. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAEU2084424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e1d7931b6371a0df5c50d2bf770bb80cb6f060b357e82e53c13e1c608d5ae. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:33:09Z), 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/QZK6P2454930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2342987178df9365501232680aa749099e72e89529c31116f8d0ac0f5a1035c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCACE1545127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab814a05fb2a31892f02149e69040c852d43c0e82da09ba154b8b5fd6ba60e9c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:46Z), 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/QZNWW2352769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ccc23bc214907eb963b08821ca69a25f3df672bfd8caccade514aa1b8dbbd7. 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/QZNWW2352771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396ef59def944b7f2f662c371388d8407baa4e928ebbfa14eed5ff2eb29fea0. 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/QZNWW2352777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f34cc098e385c9f6962956499d2a3e41715d59d598e90876689722af460c81. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:30:21Z), 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/TCAHJ2372240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2649466fcfd1421c77528b7aabdfef306a8fe0cfb4fb0b623071d30f02acbc89. 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/TCAHN2319145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aa70ef79ae9d344f47b33eea73d8b67a7676d9da89deb9131e8b86e5e2a0ed. 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/TCAHN2386789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80859b2f6e9f887d7eb8dcd794ef2a054b032423664d6a7d86fad696de1ae3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBE2328507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc159b77305432b2d753c65b8f46fc62f954785e6e4d50f7bf253bc2fb83f3cd9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTBF2383533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799b8f8636e76aec05680cd2aa5a1cbbf5a562d5bffa5a44e0f3b720e70baaab. 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/QZTBF2383540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92e0ed455e1985657d9643ef6aa69baf568823f36df0fbabdfd06e3d99d9bd5. 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/QZRP52441192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0028d0ca2f17230794b202810292c633f94b91344496a1840ec8ce8b983e098. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QZNMT2457964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d7107ceb515a6a2f46a92f3714868fdd4f6a24195af3bdde9930db4e2b3cf1. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTAU2406744.