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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3839508b270190940ea66f9ce565f209a7e4d6f46123d217e8cebe2c5b47e0ba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97277b7a-1a90-4e3c-b6f1-bc06cdcbf962.json and https://artists.proofprofile.net/proofs/artist/97277b7a-1a90-4e3c-b6f1-bc06cdcbf962.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47447c61bf987fac86d00537eed58782129255d201891d2475b661a4a49b4073. 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/QZDA81889660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80992035a2b0c179d3fe0b409c7583e66d2a753e79f4bd8a2c34359e76674cfb. 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/QZDA81889662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e426e6176c793df308b8b74941ade64a1f5b45502849227d14dc6375bda4d89. 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/QZES51835551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5676c24205989c13d1812448d92d0e4b0c4f8e35587ab0c79bce19f7435f9c16. 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/QZES51835552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e95dc3b973b521d936287ad70efc2f2a57da649bd46d3da0b984c6d1d0bb7e. 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/QZES51835554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf052c676526d7c0d2087bde35be9e22ecc1a36bb9353bcf50462d961ec80ed09. 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/QZES51835555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d60ac9d32bf69c853fa4c1168528620cf8c9500e13f71307f22e6227fcdbec. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZES51835556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77afc79f6b0a992412b347f394a04e37da7a9d4be70952e78c2ecd66806a8add. 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/QZES51835557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb41ef9cec1a4510c57c96481c2ca78d8031e1ede15fbef6f059a5aec4d1096a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:26Z), 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/QZFZ41947402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fabad4739bc08f40be7fc836844095c3f80786229f846e6ab254213099e9bf4. 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/QZFZ41947403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12b190d27285be78f578926dcb377d85237610f35e2c2e6a82386f29e41b596. 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/QZHN51926809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69f6444123b7886f70222ed51d3e20f2b773dea46e9f6b65dd8b58ae8a272a3. 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/QZFZ62025968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e2a4e9829c9ff0aad1f445430b450bb045f6acd6dc5ff4ca0b8022141b4349. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ62025970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67307954e4f62aef859c0b3fbb9d17f1823b6254aeea2bbf2ee90fcc24d4c915. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES82053451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c86851be3d97847de2913140de0dbf93b1c411239287083ba05f47ebc67b2f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZK6M2065949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a515bf660e685c8e358cb57fc1f7ff8b68e7ffe84cf5eac852ff319f646cb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2050036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1685106bc47a83803143eef26bd710b132030699b86ed238dd153a0439a39151. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2050037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193de574f70bc8e97e5eb1ac97fdb809850735c7383922c62868ae92a5e4c484. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWU2050038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8e5225518b54e6b47719918df96e6c2350224eaebf9c5775743afac68bd0a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWU2050039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcbb616b640bce65b39a693a9b4c0b422bd8a52b92ed7d4cf10100dc6f42adc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWU2050040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdfff29acc4d9cedf611b0f8f79c5bce2472d952d30f66359307965844ad330. 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/QZNWU2050041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330d391671d2cee6802e9bf793c7e15514c9b41662339851839aa253478a9644. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWU2050042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76140e5adf73839941145b85eff72453380ac8803dbff6fbd9d77df19e3d65be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWU2050043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479326f7401c1ff2f9ed479d54b5b5e640cd7716822209069c8fbd0d5d48a963. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWU2050044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e686bc604f7efeede878e09ad1d8a4ff1bb5776049fcd17da49e956168457. 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/QZHNA2157085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741cc4683baff96a22478ed19c8e018d8031a88e6bac52dfa62c72e645e1334c. 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/QZMEQ2104507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa04e969eacea43b214a9cd310b6c0ce1b834e40ad830016fee8e77d09ff6f08. 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/QZES72228101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05118fcc578896b9ac0505d14edd6cc8ea5281546f53b8f5bb42eb9dd683b21. 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/QZMEP2226777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734e1217e99e04cb13817297da783feba5df400e97465f051dd1b454d2fc3d84. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZMEP2226779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6d2f9e3ce1de5919c0034fce3ffee64293f6044033e3ba455fdb9457937cea. 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/QZTB72288446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103aa8f17738bf22435d671446a7320eb2f8374d46cc48b1b2c08405142a3773. 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/QZHN62376463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a57c60aa074724c38f7f21776c214bb587978d85d91f92d6ad6d906dfe63b7. 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/QZHN62376464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3a10e8b0ff274a235f57188dc57dfffcada28014c9cdd81352a6caffc0d106. 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/QZHN62376472.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2790ff54849b52444d0d5e438e66c5be247375a6e5f66eba2a40a591a9059a. 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/QZWFL2340612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e76db12e39d448ca4a079436ce92a3d871211e848f379f7505e81f6b4ebcd37. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:39Z), 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/QZWFL2340613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42401584bdffbcfa405c2c74dff7ce290b0ef93aff78d6fe9ce1f536f5c77ab6. 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/QZMEP2224740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a81a271f8a69b9160726a4033fba0506d95fd9e7216ad07c44a2573f6cfff6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2029229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb89e9fd86a2d28a750441994bcdf246b0ce5503d53da8e561a65bfe0902d1b. 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/QZFYZ2117003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b7ffb3cbfc07aebee774281bca8e60a8ed7931bae4960454d804f12918ff34. 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/QZHN72037939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43a27e2e06377f35503b38db81ca85103841beac463a1bfadf8796af3b2e085. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZA232300070.