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 0xbb085cc860d9a6827f9dd1526bd6cb12480e6543b30aafa2fb24885042c967f5. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0c19b3a-a8ab-4905-8eb2-df6500b6fbb1.json and https://artists.proofprofile.net/proofs/artist/a0c19b3a-a8ab-4905-8eb2-df6500b6fbb1.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 0xfce199ab526a585bdfed77b4d9b81e1d81da3723411e3add3cec86ddca8d9ccc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3EY2406299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3173b9df9c4ad168cd8803547891e7e6f432ba96bcc07323d0a83e0d964bde4c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QT3F32443694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e768ba10a9086f95d977fbad572723c9a4b7eb79b51400ee300b0e4d925017f. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:34:51Z), 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/QZFYY2570883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea733d6751155925a2724f8fdc825bf2e40178f89c03703f3707b67a6fa5e3c9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ32524221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127575e54352c5560daf728d3ca6d6976bd50b8f5a8b8cb0a41faf70d808f522. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:04:06Z), 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/QZFZ72507928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b7a8b2e89884178b716c87dd075b20e0bb6ab17522c1574d317b9b925cd4c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA52572013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e508d1cd47c3f113a4da6acd3191aca2226530fc08f7d2728dd4a5543a6ee0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:03Z), 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/QZES62584188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9c70a9e18090633ee7bd66dd2c54eec1aa24719983dcfcb4097d15a8993edb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZES92545272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fc30f5fdecbd8e0fe6a4dd4b29df92e36176ac6644bd31243d3c77ccea4835. 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/QZHNA2582102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5c6bbca7a4957aead74a55557698eeb0e3930ca6f91c4a6c80a096b4f03f7. 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/QZK6G2595405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de22e64428d173f23d9ba34c7203914e7d6b7f87c3ab839f2ad418a2375cfd3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:32:44Z), 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/QZMEN2564795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0d5915307773655061b3c27f98d60337671c62385f49f23781269e31e69ada. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPLR2594913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8680767d929332db26a39e027bcdb1107fe1d7912dd6cc2653beba5da7dd1f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:35Z), 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/QZRP52550921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77367eeb63b249da2046cbf144767431ad468b65ceaf6f4a012249a2ff745348. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAZ2573390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fded78e36f33e962908650e6163d8a26c76882e1102a2aa8de479fc67e7959. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7T2539190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeb0a26daf171abca7e9c18a65641d45d93f0633d626aa1ec1a4ba4792b3a1c. 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/QZZ7X2523544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3961a44e9ba28ae5b29d78da3043b843e78c6698541a98cac738644ffd69c80. 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/QT3F52597871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca571db9da24a2434eebea0a80f1ebf77ea094f4206d03429187163277dbd24b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT6E82500254.