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 0x1c757ced29768b6c48cb3f31711ed50dc58b6878dd889d5c10ddd36d792d0da9. 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/5c6a5c41-c22a-40f6-825d-5c7b2d646c73.json and https://artists.proofprofile.net/proofs/artist/5c6a5c41-c22a-40f6-825d-5c7b2d646c73.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 0x12c0b0a2857287a95f127110c9fab03a00de3904a474ea3c9c123e138399e3b9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZZ7K2453438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02235031ea6dddc463ae5d9ca152bd456932d0fff136c6a42f1ac5d0d0bb4bc1. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZZ7K2453441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4dab46606593c4adad5626961c67a22325453e79b7f3009237a7f066a46c4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZZ7M2412078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc09e4681a3706f53e154cf79f9eecbb1276af9ca186893ed52ed39b525cf1e2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7M2412080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd310ee78f6afe3f76a4de979b1132affc13bfe133a6471c876f06f87742f8fd. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZZ7M2412081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36f2f7c29efbb3428c10a14a2880b1dc86ca06d69cfc711dfdd489f9e0e1653. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZZ7M2412082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdade0e472b5e70b7f2a3c1275c9642c7e35e6d7aa75d27f29afbef3acca30eef. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:03:45Z), 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/QZZ7P2413335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0681a97daec9f6af7ef84316e10771cc933d5dab6257049f4831a578f6af7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7P2413336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842abfa428dc4780d46fde5907bf7aa4d08ce7cf59a48334393a4c53170a2fae. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ7P2413337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208ed615eeb0665d9d441bc6e61a3ea40b5a4d0e7d70778c4c59711e988d6284. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:49:32Z), 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/QZZ7P2413338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9cc38d64e910be26d280cd7809b66c7e221727d39e2a1fed8a9918260975cf. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:39Z), 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/QZZ7P2413339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e90c28fe5c9488ffbe439afa1590bc5b048422970c5106d0f44d440889ca32. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZZ7Q2428351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca48a778dc144def24ecab464afec67d290f83a657d2bc3a95b13f302de3690. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZZ7Q2428354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7938683cdab4dcddbbb67365885fafcbb728af0db8c2db4e0f2c8ea2b6cc037a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:43Z), 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/QZZ7Q2428356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d78b2bef2bfe2a814c25b5f6b0b2c6a30d7c768d51386468ca90e14c8439e5f. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QT3EZ2458511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27a37ddcb3171a9d941a7ad6bed2388cb4ff6c15d962eaecdda3953cc5eac88. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QT3EZ2458512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6b0bb84039f60948b528081cff7e2c1b4968dee1167daeb3178a61ba804446. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT3EZ2458513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3e8d86d418671670f0bba6456d52229d190f84f05fed97d3cb64b0370f8054. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QT3EZ2458514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c45d58bfa4f02bc1df8b1d7ad37e86a113c210795864d14c75fc2b5fe3a2f0a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QT3EZ2458515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ee1e8dae41233eef8619846d2cdd3617e05a725c5b557c103ac701d9938764. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QT3EZ2458516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a85d9df412cd9a86b78b6c287df1aa9fa68bacf540b4bd335ee37332d627cf. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QT3EZ2458517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2cd81d9d9315d5e63fbeb29bd46bda740acaad1cf9ef97339fba1a2a1d9fdb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QT3EZ2458518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ccadd0371827ae1f5b35571eb3a56a62d8101019f23c5d9efb0c896d821ad. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QT3EZ2458519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26e372e0ae167e9c09efc07a5f0b581754c15162f90ec945fdab2240e118996. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EZ2458520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a21cd00c75d09d07697d4ec3d66ed14cfac2ac7dbb3631b33039516fd31295. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QT3EZ2458522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7668b57423da69d08263e6b3513b4fc6232d989a3149edf15035469c0af3aa7. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QT3EZ2458523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed19ce5ca43ec3ca45835609fefd07f1b136c3809ed20ef85630cbb07e7d4fd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QT3EZ2458525.