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 0x7f80bbb15d2c2be9b90d4147b7fddd3baaa06e218ce934a10ceee928cc5599ee. 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/a425f788-a7b0-4042-a9d2-e5b909a24d53.json and https://artists.proofprofile.net/proofs/artist/a425f788-a7b0-4042-a9d2-e5b909a24d53.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 0xd37cff6599a9ec7cbc16ea79ae9bec9e9b249c4c72983da0e19ef368729f2126. 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/QZ22B1960640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2593bba82457ee0704b56f6a8402c574aa9ba86952518e141c22a4d21a4503c1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:12Z), 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/QZ22B1960644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1496a4d21237ee1204a8b59889f866824822ae8ba36109c78e2d8f5c6dddae. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZ22B1960645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672bc23dd564c6b032749d2ee10934afc88fe5d136f91bcbe3a2d02bfc4a369a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZ22B1960648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6816c8e75ed329ac19f57e80be8629745892449b52f406a3f4069737e73ddac8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:22:47Z), 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/QZGWW1913001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62937aff37e544ed3234ef0dfb07addebe260a4bc109ce029ca63c81465e111a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZGWW1913007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a79e71f3fd6f79f0e2915be8748e044eb482c0f453ce88afa469b80670d8440. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:50:17Z), 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/QZGWW1913009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc8fd30488dece8087803beeee6791bd543c41a0e1bcd9cd08a9a8733f7f565. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:51:34Z), 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/QZGWW1913010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03732361ac06ea4503f63a6a3282c91366f8f14a780f11da77083de2f1195ddc. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZGWW2118094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6254c6f6f5492af244f98be29be5a0f3cef1e4a4f9ec4c40458ed60562206f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGWW2118095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac371041e1add66e7cc6727d8389230add5c5f1f6899947fd833f10d330ba35. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZGWX2205194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d733b6f2b021931a0a7b2c82f4cfa9726db3244ad909681faaefe6c354913cf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:28Z), 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/QZGWX2205201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198fcfe4b3d5ac229319f9bacb694770a7cd87873cc0a77a2b94ca125dcd389e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGWX2205203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232be03a9934f5429092f6732809a724313065b4c5a2e76632e017ad9a505293. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:20:27Z), 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/QZPJ32179107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1114a25875263bc57d51c7a45d29cc97ab0a9358c953d71f966d4eade4e071d9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPJ32272754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31c86293bfeb676939b5492f5158d906ed5607f8b5b7f7e948dc5a4c88ab9e8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:43:17Z), 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/QZTAY2556745.