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 0x5fcec64a1ca7aba3b49dce20557c93a112bedb79c3834bfdf182ad42ec9d2650. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06412394-89e1-4339-b631-6f55ed8f41be.json and https://artists.proofprofile.net/proofs/artist/06412394-89e1-4339-b631-6f55ed8f41be.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 0x881df8642efa01008bc04f3411184f15c8c26326c7365a11dc3b992884416a6d. 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/USMH92378565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398334a27ab907d328ca9764edcc59431fd38be51a41cd6aed8bd788dfd7161e. 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/USMH92378585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96be91c454e7b3d6b44ef5dce0bd7e012a0bd3f103814f5ffd57e1eeeb7347dc. 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/USMH92378569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e07bff6c38b12d5b6a4143782a1773eb15c7a28aca2977c36fa94c7aa7c2c3. 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/USMH92378577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe471b8c5ca5c871cc2f5ea856d9bd8f7fb3d4ad84b5a87c20c4f4f6458448f69. 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/USMH92378602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8999ca158ad31e35c772b1473494cd8f93429702f594ff074f56d8452e9b143. 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/USMH92378603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cf145b9a805737e50783e4cfcdffcd38abe40447f70d35646e4798ee8718ab. 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/USCGH2194944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bed4f7dce472a5d78543f2907c216f87f328024c969f8fd21ba5268ef34aeda. 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/USCGH2194945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3df3de676c591c766dfb06ca0d1b20c11b2fb3b9c3c275a7498c823b299ad8b. 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/USCGH2194946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a02f44f68fd348b0e7caa323ad25ee1ce18dacd1bc32ba1697d5e50fa425849. 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/USCGH2194947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b65cdbd8fef1ad5e1fdc2d559377a82fc0f08b583c10f2754ff41f3cec317e. 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/USCGH2194949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e263b6e134fc064e086438e80c446551c002ee29f6043996bfe2e55ab0bf97. 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/USCGH2194950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20a01073a22df109338a2f65313ae4c5b11c1dae0e6f18daf6d094686823810. 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/USCGH2194957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5d9c2709e1ffbc4ae4052b22d2c3fa1c20ef6bae2f04b1e7316fa68f6b8d0f. 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/USCGH2194958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe63d2bce888fe4fae728d1c8f6732c26d111620d8faf6fb449d9f37c7362c. 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/USCGH2194959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd147774e445f0535d47a8d329450049f5295a368148a58a2ae08c0cf6b80e36. 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/USMH92378538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a4e53af8d3010cd2f91cf8b495228254068dc837da64922c6d4d609b95c0a0. 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/USMH92378522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fdc1d428342704f8ab172aa748c56669eec6bac50798e42c0ef23ba595d963. 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/USMH92378540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00a44ccc7c4ed228b0aa89a92ffc606a6861b7186c49ec2c239376d51c2b31f. 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/USMH92378523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc6cd5cc30c4ab2c65835c231639d9fc1b4e96e74d7294498d3457184b5d6e8. 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/USMH92378541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfaba43e818d726d605b7d5a701e4fb3a466aa70137b472e1eb8f4bbb065a3d. 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/USMH92378526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b738d4300d3058b19f660632931cefb25a84498fc3c5d07fe09d0d24bce575. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMH92378527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147e05ecf60e6789cfeef83a605b582d46614b77af0ad5309cf759dd59e24ed3. 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/USMH92378545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1b8dd8931a7041f7b2088ee965ca40c9e6f0f05be5d2c020f1ad956a24ad86. 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/USMH92378528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3259769f95be205652d32ec290efcfbef7f4d5117486a02d0819e13f2e510. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMH92378529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cfcc406dd90a81da38536d0af71ece8cf9d30fb36c0b75e2701a495f8f9a12. 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/USMH92378553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a7ff0c7842377326639a11823f671f60e9580aeaea197c102af6c471966909. 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/USMH92378555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ce352ef4c4e7c1ba9f7ba4c18dcabab5854e373b0618112d27940ffc4f4ac7. 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/USL4R2172588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e1ecad6215ef99e397dd6211f13c1a9d8e45e3837fbb50c520d44ae8ff5ba5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USL4R2172589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a606dcbc403d0b78472edcadf414f89449c217e490ec14eee6d5c78e49e3475. 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/USL4R2172595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3e06931c81b1a40b70c6a1843d09deca102d60eddccb22adefa9725e675c33. 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/USL4R2172614.