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 0x7c2115d002b1c5b9f15d3f3dd73a686167fa57eaf6ef9757243cfa74672800ab. 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/1229eb11-4206-4f9d-956b-2b52749b70ac.json and https://artists.proofprofile.net/proofs/artist/1229eb11-4206-4f9d-956b-2b52749b70ac.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 0x3e3c2c618b7441561b4664c66812ec375ca99720f9cba6ad56d21d73c15b52cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACN1651485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaec8f115f4c67330c515fa4c5788e75c34021f3d57fc522a5e38d4fc38dc7f. 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/UST8K1704190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee08fcb5f0aa1bcd600cd6196e3b22c480e24ffe1ec0f422b6b33062fd9d0e4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCADH1722981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e827677a021a175ceafda703c79fdd523f3dcb288722f5e63a3ff1c5b63bc2b. 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/TCADN1893532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e680728f5dbbc09358dbfbfda138d3471b453380fa5696ff0587766d10b17ac. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA51830589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dc6a3bc6adfb91d6b3a8107b76ecf3d699b81479ac656c4cb341e244913bbf. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:01:03Z), 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/QZHN51954726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb36264514d59fa82c471a25911d07bced249f163f0c4938a39de8f40feb6f19. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN41933236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc604c8d4525559f6eb7848fc7288e1453adedf96f9d104cd124c4a8d5c26bda. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZHN51954728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7986ac6ba5ad21ef56fe83019df36c461d95dcf00aa50102ccc368a24c5d5d. 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/QZHN51954733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4611991e1d4894ece2bad6f2eb0e346d10f85a305822306348867b39d4867fe. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES72108071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35c3b17ce15523705177d7688e385876a1a258d795e2bb2bb3b73dc5199487f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN32186188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd70f8a70fb859ca762cdda4fc7bb7803b4f089e46bd5a99db0865134efc139d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN82124940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f39cdf08b8eb7426e830bf4893dac4e8109dc513047839f93692cb24f0e61e. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZK6K2160169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1888f68a517840b16bb72f047195f11907b5cd3245aac8c198b455a76a82b00a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6G2372202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b49a4699a84b290c73da74e5a5b465a3455842e6c47b0001a2abbca14e3da5a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES92338254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90bf6d2f74686f5fecada8c6acc81b1dbba9e746f685ba41e730d298a1e74f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNWQ2388084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516f134a4ee7376f538538a1705fbacdfbd6314de7cb37fa8184130180a52e10. 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/QZMEQ2133990.