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 0xeab298fb08cc2d64c599cac2964ffa7bc62d3364f05945a6ebde239c64e817dc. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec75a6b3-ad18-4d0c-9efc-e7f9b212bf1a.json and https://artists.proofprofile.net/proofs/artist/ec75a6b3-ad18-4d0c-9efc-e7f9b212bf1a.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 0xae134e636d391fec6e766059af30b70db415affc44b727d0743ed0d623d63de2. 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/TCAJN2510120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949451c09de6c62c625865d48dcbf1b87279a4da4fd1f6cb325e875b330555bb. 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/TCAJN2510122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c811e266bf211598d8472f7af3e2647f089fb60d2395c99aa928677ac20ece. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:57Z), 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/TCAJN2510129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9075db62599c597fcb057ce126aafd4e9948db2caf877de7e25cc215fed9719. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:06:51Z), 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/TCAJO2510132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f24d184d8000d905baee9969aed4cde8d89ea28550073b04ad126e6af160fb. 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/TCAJN2510133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4c926851f63e440dd2ffc7839c633d7317ab8403caafb6f5f275c2fb866611. 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/TCAJN2510139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd134ea3ff93f77993669a2b8721600fd7ecf3fa385c79b2f2116ce8ad33a5243. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:36:09Z), 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/TCAJO2510141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb080fc1daf8e92f179342e90ad0661923ca27c078315bccb0d831647acec693f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:11Z), 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/TCAJN2510142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d4724b95a98b8e7f61275f1b320880d96c0a792710306e1872f6914b4f86e3. 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/TCAJN2510144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d55d98729177eae86d5e3a29ff7e4e4accaed04de566efcdc0a3a067e6afb0c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJN2510145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355e60f334138a8c1a2ab5dbc7f10c5491466990e17b4f90ae39b84f47b5c2d1. 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/TCAJN2510146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605673373265f173e656be046a730476e5bbef901d6528fdd14960465f61406a. 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/TCAJN2510151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3572424473393bf3644bfb13c2c143c373ea69f3e6913ef65b888890f8a40cf0. 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/TCAJN2510153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b56b662e3d2c0590f854c0b6fb894bfc50d9ba8d22a8b4ded41aafde342748. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:26:51Z), 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/TCAJN2510155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1271b42e9795d92c991b77ed5f08ade25bfdf92552fcb71c9ac93e12b1f9ebdc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJN2510158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4045c3a9296b33cebbcb26f9aaea3ca9fec9f6c71b3c024faa7d28d0dabae3c6. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:08:50Z), 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/TCAJN2510160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998a856df324967237a5ff2d7665f0aeb5bd826f793c3c42f57b421c7ba177b4. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:22:09Z), 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/TCAJN2510163.