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 0x7ebe8450309a092b0b106a9cebed9a0734ae6e125df62d4cbc516b67f89abcba. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d726a313-5b56-403c-b2d8-3dbcdc9e323d.json and https://artists.proofprofile.net/proofs/artist/d726a313-5b56-403c-b2d8-3dbcdc9e323d.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 0x13432f3472734cfd0b8c29501a9076db1523487ef21a24483aa1872ffcfa0399. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ61900734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78385a03d4dcc37cf5bcfaf00817f98f722ad5165120fc6c85784c9eda614726. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMEN2250265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a530979ccf7f8a217a312b5fb32c7fa8a84ed87627d6ab960d9c35edde25e39. 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/QZMEN2250266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0437c460374c403944dc0c7165f1db68aeeb1af067be541e0f99fa3328074f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEN2250267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d39d5ad822a1eff277306d51f941e1276c1031ca5c6dd1ad2ad084403dc0713. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEN2250270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a79ee18a57160bc378eab4798fffb23d1768d58ce5437090fa54dcd0a1abba. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMEN2250264.
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 0x7feb682590a044b5b15925d78c4d88d201987c543b506ed1260225b77e4bf2bf. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZMEN2250268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef5c14dfb3cba6e59b1543bfaf9e454a912624d03bba0638820432cd0cfa2c1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZMEN2250269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68057a2f10a770849264b5e50422e35006f8fa7582841ab2d24b4ba32bbbfda. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMEN2250271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e8c8b57fd53d586e700ca4f1c065742be7667af9824e5d8f56a474a3f7365e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMEN2250272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0138a4b973298b3ed50f94a8454f9466e0cfc2e9b25cfcc26ef34935c0fb4. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZDA82500730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f7c63b11314c263cba7d17142cd0d400ea55e77da10e6dd421751a7728e5c2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:08Z), 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/QZES82514144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfd7595f1df55ef57a48a1c24f95ee794baeff2d8f9f96c8fa9c13a3046391d. 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/AUGBT2403042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0138a4b973298b3ed50f94a8454f9466e0cfc2e9b25cfcc26ef34935c0fb4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA82500730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e60b1846da2a4861182cd6242ac47d7a1c3f50f11b57913cd9d8a904e0d262. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES82514145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9823bc2373064943bad111622a67bc41a434209a2a27aaf0d2289683d9bd49fd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:10:57Z), 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/QZES82514146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6144324bad1791f9b9104a05e65fda473f6d61a67c278f415052dc9b7814f61f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFG2403805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281be03f4d2c423fb9d3a8fc589f834a618f1153028fadc8697c1de0743db463. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:32Z), 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/QZES82514148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebd44626fa856b08811cbfe814a650417aa3e4c1ed6188bca2ec2242fbc3354. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZES82514149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d58006697675c49a3fb1e8beb588f73f6074338c0f1d3b4e47cd19c87eff18. 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/QZES82514150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba304026c8127bb5d0febbb7367ab759f7d087a622e885d6229c2e697c818cb. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZES82514151.