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 0xfb32fd19e6563caa2cfac93e72ae9152f39715ac26e239f02efe79b75a6fd810. 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/5a8b61fa-6c34-47c0-b09b-2faed5907ccc.json and https://artists.proofprofile.net/proofs/artist/5a8b61fa-6c34-47c0-b09b-2faed5907ccc.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 0xcd6900e7bd53e417822fbc0a402db76986f0035d9a776789407abc7b8aedb9a9. 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/QZNW72368743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fff9e2343c955e13fb2f288155871218bf5cb91bda4b7d3afc875347389161. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/QZNW72380273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0512d356a41ac9639b3521bbf21a97cd60790e675d1ee5b6d0b3f7b5309a2257. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:18:31Z), 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/QZXLZ2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80990b31f63f8ffd85dfcac66650f1f0c6190ae03d475a9ebe25538456f2fb75. 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/QZXLZ2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283253f268988e830319cdfea21e895fe4dbe78590c672e5d7eeb80544f1b55f. 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/SGW502323971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d323838e5f278c48833d3b4b76fd6dc1e2bbcca6b0bae4a7027382e659fb95. 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/SGW502362429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5351cb974ab4d48c3bdadcbcadd2425b10c72821450e3af7ae41e8871af2b3ee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTVM2387310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adfaa7d8291579e88bbd34048aec826cf3c0ecb0ac1c98c03a0604f80928886. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZZ972336203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d81776385d8a3f0b704acee1d695b9dcf0ab636aba63b35b821a9391c512f3. 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/SGB502471472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211ee72d7dbd0a6de759d4f10fa2b0299c47a20ab8ca4b54d2da2a5c6c34ef1. 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/SGB502488669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cd33ee99bc11d1cffe18e1fac66c140ca4c19608e100bfd129bae0bf4f3021. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/SGW502413726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff22366a42382f795c82bc271fda7d09f7186facef4121df9abbcd894c3b5e9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GXD7G2478712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a925faed5894405f7702222796e4632b52b62acac31e392762a6af309fbf057. 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/GXD7G2300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aa5e1f970e47a99bbf9e45fd5e467030df257441afa4cd0120fae7eab8b273. 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/SGW502231184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5242562b2982ff214a0ef9593fd3838b3b35572be874af3f8e746004edfbba. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T11:58:59Z), 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/GX53U2572836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95acbc4b4d03d0bc29f6c4eba95475768c760214aed08f28ebd27b4ac7c45dac. 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/GXBAV2065819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3894a6db7816f6758b05b2f203a255b89c4caae19ea474c9767eda0593dcc886. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT5M42554470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f570ee98c7ec2f9f9a26cf83b14a429f911d0faf508cfaee3c5aae21293c09. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT5M52515738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d88ca35db403bc75bc6970938745b4eaac708ecf0ef3180131159542789fd2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:03:12Z), 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/QT5M52573120.