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 0xad3ee0481a7f8bc6b54226ad46649728c0eb104f5a84e8f5176d8ccb91970985. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a20e18-9a12-4fc3-b81e-e004f65e8287.json and https://artists.proofprofile.net/proofs/artist/d5a20e18-9a12-4fc3-b81e-e004f65e8287.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 0x2313988458f420ff56d838a0f3b06fdac6e6387d283ac3fe8b8c92ea1f91cbe9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UST8K1604276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74331390a4cabc24d135886310c2bfe7a02a6e5deacd02ed9f6263bcf0875766. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UST8K1604277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf2d54b9e10e83f01289d0ac1ce57ae987e6aa9250374dfe89dcbee6b8ecc2. 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/UST8K1604282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aefbb58a475ffb516595c3ab561c5a5582c9f6cd27f36417acfa54696348ae. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UST8K1604286.
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 0x9df8101bb3c43ea231ca93ae2314b617e8695b48aceeafd0dd71dc036605a380. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USJ3V2035445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6c4c6044c3c482414cd0ba2052a448f8e5c11f10993f6207b87645ece5b7e3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USJ3V2035444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d973a27d2e3076400dcff434fc30f4c30147364d60d3bbccdada4b7e32cbb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USJ3V2035447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858441c0ba9228aee78939f8313f273c1cc1fecd4f034bb2353cfcd3dd44737. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USJ3V2035448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3664d0808438efa6abb668fbfad75111ed94b4af01e131296fd7a39d6022bc. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USJ3V2035449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98e2781b6feb1364df1d67288949b027e1dfef50085bce3f9849ddfcd3c7245. 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/USJ3V2035451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e70a175310fe94b8cd4e42e0b7e5fc847bd6687c00f2b2abf15da20161752f. 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/AUOB11200917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52888e96e7e83baf778e9686f26d4f5c30701b5089f4457ae854387fefe75322. 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/AUOB11200918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c41bd11364f5f347eb82345e4d5ffb1c63b8ae858d8beff3189d92dc3cbece. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUOB11200924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4378b8e25970c7a1f68f8cc30707031760cf6bda9d9851614286bcd293c57422. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUOB11200933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e06c483172ea1cb3fd77e8cf2a3d00bfe744a6d74fbb2bcd821fc85e24fa1b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUOB11200934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1601bba7ab207340cc040a7ced37425425265402127d616c685145020e4c87bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFG2376163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0896fb47e5b9e7b027922bbf941a1ceee7843195827175c19f379154818960. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFG2376164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c335bdf0527a8c20e3825b7ed3f150cf6b025d4159bfa94932ac6f8a56c7438. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFG2376168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81a79420dedc114fd105bb643d8ff23dca96b36dd29f8e8c05cab0822aa06d9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZWFG2376169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259a544ab64835e4a1ab80c25a832ad7129f9d18405b6821d2808d8e8b74f3c1. 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/QZWFG2376170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb5c6e3166a79ecad52ddc426599ea440270f3725594f3802fff714227c47a6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFG2376171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae805b082f654b5778d4ba7b2b916f633e7616c10e81d7af4a82b8feca3b3a78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFG2376174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6aa73206906cea8114d165d9d2a61930ac263a28628d895b0a80e0dabfd638. 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/QMPKX1516678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ff98bc83f47619fe10add4827bbc7f5c0733b1014d677d6bd7b09ea27ade8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2108087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be391beb54f4ebaf559293f19cb741ae25eaa25666a4920ced25ec8e796bbd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UST8K1622532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5153c897ccabf5735bae25ee45d445f4846746281a42aad3273f4bce4676d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UST8K1622535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2940ae3faa06fa967a849d7c95ba0cfaa2aa2a1871fcb2f2ed780cc6bb58b685. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UST8K1622536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560fe0715c06fbdc21da55c3dce1e2b08fa81f3d551bf4fa881065c2199336e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UST8K1622537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0cdf96016bbe65827796e6d4b4b59901d5849e1e561b85361cce677fb288e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UST8K1622538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45b55328aa4af340d46c400be0646d0a798dc4167dbabf977df0d370c1cba9c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UST8K1622543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f47c0d93b178cfab81e7e7b1b09152733a7466857aeb16edd033a532d305bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UST8K1622547.