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 0x7e6eb32aae877403502a9fdd762a491e4ceed253a9f71ddaf22c2e64a7bf50ea. 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/299ef11d-46f5-4655-bd57-fb98ee5732b3.json and https://artists.proofprofile.net/proofs/artist/299ef11d-46f5-4655-bd57-fb98ee5732b3.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 0x2a91486394733010a240fb239faf66f75b2d973af9434b66c0546cb5385e6204. 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/QZAPG1895757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf355fb537fdac772d5a49b4678d7fe4c637bbbd24e6ffd736189a3a18fcc1d9c. 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/QZFYY2007772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dfaef42600f8a7e592cc36046a05b31bd7bbe4fa178ecad7e71848b7731252. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYZ2018194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe548a01ee6d70f09a580982934f18c3a79d155abcd42a651c070071513998d49. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ22043424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dabd5c8cc767e76eba6dd2010a38fa60bfeeb16fbd34cd7288e522942762e7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ32078231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1365dba6372fc38f5735be6fb5ce7b7a4a58f25651c75dcff0c720ed0a9c3d. 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/QZFZ32077016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45346ca78856513bd7d83efc24063b9d989c1f00e5faa648c3552cd122d69c60. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZFZ32079365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1d2a1bf2e1077128aed94b2eb818e57f30172f02b3337687534f0152454373. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ42030922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd9e6d2dce72a4a9bdc955547c1b6719b118486336a6f7f07f0a9959179122f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ42029795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd773591ca620296bf4a2557695cc5b13186cb1316de95b8ba0771a238226cdd9. 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/QZFZ42030924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc47554ca6621111811a0d6b4f2e51fa03a2a3a4cc4795e725d35acc92f6e8ec. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:44Z), 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/QZFZ42029787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fece4b8dbf93b8bb42c40b5d9869bdd71b0a55b03cfcdd6c71519563e61aa1. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZFYW2167345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d1c420f9873504f0b3c75ce17e1ebb08c99a2d5e5d52379ca01b1255f28e7. 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/QZNWV2113415.