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 0x0fe959abd5bbe58e1095249dfba11cdc18aed1c88f72c85adeb6e325efdcc38a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a31bd1bb-8f34-4771-99b3-de52f4af46f5.json and https://artists.proofprofile.net/proofs/artist/a31bd1bb-8f34-4771-99b3-de52f4af46f5.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 0x91c429d0d468eafed00e76cc496caeea069fdc46f4c61a59d2d8fb8c94877843. 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/QZDA62146124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc37bdeb4431ba56f32d64f0454c678bcd4acfb9e8b6f87ce5b9e62a64c2ced. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6H2100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d05ccd93852ec32f0ac4526bbf725ef2afa6e3d707c17b7b6f9515af4cd889. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6H2104576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ce75bde54d4a95dffd5f33950ee8782e834795de628075c33fa5da4219a4b5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6F2186357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e64a5403d6c9e7a744f64ed00f3bc7c4531d207c4b598e03968534bf18a0b94. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6H2100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4a1b123526e39fa047536d00a5803f1f4f589cb385abfb12a12c33e4efe7e9. 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/QZK6J2198036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea33d7159d1d17109c7dd5a2d2df17165cc749ec9b1681f05be9b62bc61e6f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMEN2126147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff1777f880a9e2e4ea40e629d26bd18bedc1d92e74c4c5c89924b84180f4f3e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMEN2126674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f8ea8531706e70bd4b382eb3bee5e9369da9e1dc2bb66ae12136d28dfbdda. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEN2126675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee6d12ed7f3623a5648d8e9c68afc1cde9bba5c119ab966cda9caf83654d26f. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:48:17Z), 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/QZMER2176401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e94036f2a51225a3f18deaec43645c2ad9a62e46c56760195f18fdb16c4d221. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEN2140937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc85bbdd21083ed576d8fd1c33c831e48e41c9a56bce5d9c5a4af564d881826. 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/QZMER2177839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160d546917a9699a41d87e3d72c19d6ef57cbb665243c47c9e81c3f7072babf4. 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/QZMEN2140946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d462246c1c0aae26f15a1f69bacd2d8e8cf79241330b9cec4d8c73497042df. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMER2177840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bc93c36f5119be40d1825b9cd25d1830b4f9d445de4b4f4f98cb0a17c6146c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMER2176403.