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 0x9bd12c42afbda340212a9ca3f4e8c36eafe243399b859b63dd590352e2f11409. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb6521f6-e98b-4629-b0f0-3f42f7fa5090.json and https://artists.proofprofile.net/proofs/artist/fb6521f6-e98b-4629-b0f0-3f42f7fa5090.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 0x2d64c58780022246b1f6b5888aab8aa3a8479897464d9e1face1673a97bccd64. 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/DEAL31500674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf41dfe3f714b9c08877bfa4d2970d5b9cc8fbdc16ab741968a9e823db7c952f. 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/TCADY1806422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660de9e4018729a95f4e2c6402f9964e57cef1b6674322b1d126d26aa3df787c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEG932202187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bdee58754b83c95dcd05380c9f125d4571354e6c52cc029e192ea33331ae2e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:01:22Z), 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/DEG932203821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0407e5b359ecd7fed9ba8df5ba48c5efbc5a0aed45b2cab437296d8d23e4602. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEL1924611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a08306b6f479b1e336e4fd46aff73bae02bb39b17d955412060a90d0d16da0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEL1924614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cdb2e1f327532118c85b1e7fbbcca31128f36d8dbf2eeef37683f600d71121. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEL1924650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ce1ea40375a8003ba6ddd8f5d506d7675f844a824a97eb6011b31337667b80. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEL1924653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d8ea15c256268a15255028a281c96d56416ddb1b1e5b5bd8eef812c10e22e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEL1924657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e4269030618852227f50f7ef2b9e3ed56a1dc673b45c2ac82375a8eb2fb1a2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAEL1924658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ceffa9c23d7390c14e53fb5c70b4e2a92a6e1cb28bc1e634fbce714c895515. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEL1924660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b5999486578a5ff00d5566d6900a0f46d921fe50c3397d0c0547ad13e7aaf8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEI1966018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17cb95b5d07bb12e20cc85f31a15f7916f1725e97681cfe24dd031ab86d3938. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEL1924681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd125492d47ceb6960896d54df35a99dde9ce3943e4a83a209903a2cf67fb8101. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADM1848277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e79bdfdfa18402d75ea715c08bcf077dd831b58f90f1e63e16aa71033679158. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEH1982442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f5ed658c6bfcac1b0b20dc3b29f085ccd89eb0dd644b8eaa291bcbd3ee99ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEL1924688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e03f553f65ec23ed2aeb844a946e7da45c30f52409722380cc3a7e01f1861b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEL1924689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb87aa378c170b4cf351cbe0ba50a90c44c75eb9e3efacac8637153f24596af5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEL1924692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc53f2d3a0d081c2e77d73428a4411f4e2379c9c5b6758233b29968aa52e17a. 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/TCAEL1924694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60395dc615ec64193842107dcb2279f448ea57efbb2b4c0c44120fa046130aa2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEL1924695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf41dfe3f714b9c08877bfa4d2970d5b9cc8fbdc16ab741968a9e823db7c952f. 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/TCADY1806422.