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 0xeb9ef6dfef048e1c6a51a32302fa4a4559ae636088bbd4c5905ccb4d01ae14df. 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/9e47eeb9-43c5-4f91-bae8-1fb3762b336e.json and https://artists.proofprofile.net/proofs/artist/9e47eeb9-43c5-4f91-bae8-1fb3762b336e.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 0x03e9d9829cc020eb2971d5d769139b38ebbeb0e44e3a0f9119b28b352f4c9135. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAAR1015434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16f40b2ddb4e06f7fdadd2f01c85e033396d532628dd0d0978d3174b03ae238. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAAR1015485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feadc5966d8371a3b778bf805c34734abb2ffadb29123df85b00c559f564b42. 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/TCAAR1015494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599e122283e73f0a04021801ebc336e2fcc4de2c147d0c8b17c92b77b89887c1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCABC1198868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8501d3fa11dfca59e2a0ebec41749ab1fdd63596f4ccd38a5386b2c0ff677b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCABK1232915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340de9106ebadc521f03c201c3997cac4a0d17123ccc0938b3f802d2759bbb25. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCABK1232918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb756c1da1752831a16ddae7f42ecd3728e993467a81ae4042e72cab29b15ec1c. 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/TCABK1232919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a099f81c15449bbd51a1474ff643ebf30cc0614e0bf5047db8f61b619b88e4. 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/TCABK1232925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd897f0798464b5f1dd223793ad7300350dcee23e6f48d0c56ba2c9447916045. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCACJ1545133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd52258c2c1c172229534797441a9a9cba0b7bb91eb3ea9e75712be662f94bf. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCACJ1545145.
Keep Huggin' that Tree (Cuz I Got a Chainsaw)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955e5c1e11b8f3eb7a7a60cb051bf06567c55d10b6801a0fe86f22323ee0d00. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCACL1679248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90df198b5dbb34fe741793fa366d40dc6acc20cc8104fc45fbd4893d9c6da321. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/TCACU1622303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99dcd6b67d4b59eff0149f9278d3d14c06f6215237d8bcd0f6bf98dd73b2544. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCADE1739314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59845e99df05ef2bae6270d9d45d19d04b81a78346f6f7072e5c4afcc1f6aae. 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/TCAET2027687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b678f8773ca95ec5c3955f366c8da0057045ce20c84f64e55b589f4338525bc. 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/TCAET2027487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1b64a6a5dc37968d41f34d4cd9c095cedb3c37d73a0138103f7cea2fd22078. 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/TCAET2027528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48418ca4ffc998def105c0b082196cf177925fa6dff85a456f3e810eab25633. 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/TCAET2027530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa317679fcb5a676146167bed13636093f04d026f45dfc4c5ccc8e51e33b6b619. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAET2027622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efe35c1d31b0dafc0e49d410a1bc952e85090786432aeccc31f3076daf03cbd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAET2027553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bcf04c98fee39d164d6b359f49db3f2ee45ea5a5a614f0793916b8fe2fd07f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAET2027613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca9a95c6864f2c52f5eb740f395c56e2486f3e1c1e72500e3d3496342528d1b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAFL2135331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eb19b6b44cdb0f029c384506609dc0e047633fbe4a7f51c07c48e1c5080ef1. 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/TCAFQ2135751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cab29b7552b7be2eca7da1a97405dd13b66283dfc6f62d220fc2958011eebcc. 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/TCAFW2189621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dd22c63dbc0fdc344d5e62606b789f68112aaa1c619e92d0d2174e706848c9. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAGI2261430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818c5beee79c23e66ce117a32ef5d7f3213d75a948240822deb36e255ee22d4d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAHJ2335113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68323842e0f311a44aff9f6ca4156fe226a2348037b622d27412c6d040994c0e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAID2402370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912f7a9e0ec309c359ad70f00b3ee5f7acf287aecfba941a73dbbe1dee9d27cb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAIX2430212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68323842e0f311a44aff9f6ca4156fe226a2348037b622d27412c6d040994c0e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAID2402370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1316992cf804a37bc5cb2fe5b25b825fabb32cdff2cc8b316515634e34cd16. 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/TCAHX2456222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818c5beee79c23e66ce117a32ef5d7f3213d75a948240822deb36e255ee22d4d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAHJ2335113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceee6ce6eb98a732a818acb94b217b9a4bc0d0a0276464023def7d48837127c. 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/TCAGZ2317879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d509257c5c579aa7a4f315b3251c1b302170a7949e0a7d7b765f54fb5e133e. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCAGU2393633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dd22c63dbc0fdc344d5e62606b789f68112aaa1c619e92d0d2174e706848c9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAGI2261430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e65d9a4350d2bca50de7e3f5d5d2297b1375435315f5bd456b62c8e434f09e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAGD2255191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa704c93bf7168ad9ad24f33b0eab61fecb569181b59f17d84c7b0e0575a599. 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/TCAIX2421819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709c97323dd472d0321ee64e85cec1e791d2aaf1b7705caf0c32d480eb8f0315. 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/TCAJL2562759.