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 0xf04b6463de6c161b35790fe5d8da07adc5f992ddb1704bdc0426a3128527ceeb. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32b289f1-44cf-4b09-bd62-a00e2bb20a74.json and https://artists.proofprofile.net/proofs/artist/32b289f1-44cf-4b09-bd62-a00e2bb20a74.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 0xf6db04f9064fd5c60aede7b45ed5a482e0f68575a7a9f29048551ac6bb984050. 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/QZHN92365238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7240808a52d16ad185ffefe9015dfae798ab4f1ce94032fdaa8c7bf64301575f. 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/QZHNB2311117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c5fc4026f1c6b6bcd1bbbe2dc3e8b22307c56482fdccd50f870f7c45a07c32. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:01:31Z), 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/QZK6K2315128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8cb5fceb024aadbd425f6bf960a6562e56ff6060e46969ad3a71d3cd4b42be. 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/QZK6H2337881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d72c6325bc868deb9db913b09fb8801301721f70905e81842b610eab3abc70. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZMEM2337553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec157a4118d42a9ac9d874d4930caad4f50805b8a0ba2558dfcbf1a2d9996412. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWZ2388630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54767b90c8a7361b9388968275f3e760def33f639fd6dcc4e800ea9469042333. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFE2349346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d075b7514fe137ad4be2d1b180af256397fb6a27e5554df082402928a8c00a. 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/QZWFE2349353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae47ad1d01935380abb06f50ee139776022e535ab41b840ef5cbd06d59ece78. 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/QZWFQ2365701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc482d142c2b146a85b49ea6e8b669ba41a1c8bf7bb19f1f2c7cf1822fa25e200. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWR2452043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6812054849bb8dfb1c5a56ae137b997a5124b8c67aa8d6817140ae8be52459. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA82515159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0bc6aaf191d5922897dc5dd034e94889e26e685d912e7f2a25c00e8347643f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZDA82515160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b3812fa21e825fdb8caf3b0db582c49725e0efa6268563182d7dc90b04fa9. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWY2544249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64323da5d2271cf03a88649adb103ca8b1bffcbca7ed6e7d3b96a631baa06908. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWY2544250.