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 0xa5656b82b46cfd3a4d8db810b3135db51654f72f090ed2b4817d318adbd21bd4. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27e28a29-797e-495e-8dd1-fc25f0f1d016.json and https://artists.proofprofile.net/proofs/artist/27e28a29-797e-495e-8dd1-fc25f0f1d016.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 0x21d5a35ae513df4c037ec3ca7eef35fe6c836ccec920ee7c448f9e851990e1dd. 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/QZDA72378249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de890723b1699649d41c5f4af82750f52c2d780ea5a69f763c60328eb9c45e. 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/QZTB82367612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370f0f199eccd3b0d935841204a1a02368249b6510d01aa4bc81396bb9e47e4a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTB82367613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54976b604b90c2ab00741b00f640d73304160415763eff59bc335f309aa69388. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZHNB2427674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa173ae9277e5483d58144d48fdfe4dec7516d09e1d4889d6bf7f6b110205482d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:08Z), 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/QZNWZ2412798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b58641c7ba32d302aaadba32e8f473e2ec30831a4d1742af399f54fa9759d4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWZ2412799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee55ec5fea47dd45d865c1dc958c0db1b0e9c3441d633cf132b78536faba83c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:45Z), 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/QZNWZ2412800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4deac3d2b68cec393e497202e8834e3ef863c68bd41afe8db1a0dd941591de0. 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/QZNWZ2412804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa953d8a40b244550a471de62bba720f254ab81bc336ff938bd5d4cd52e218f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QT3F32478369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa83601159fc56ec2350472de884a0956c54ff8fe65f18029e92c4e89865c943. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA42555576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238b7b6306d1e33be69b15f6039ff7da70fed5ecfb801e1e11cd7a0c7e619c20. 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/QZDA42555577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e386916f9cfdab6c3f22918f373554462a5c64d1e39b4f606e3520532b0859. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA42555579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7c4687e96d6a92ae89858f6e0ee3c098255f5f4b9e1dab8119c089396cf0cb. 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/QZDA42555581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf64dd99aac24406525a6eb0003084f0eba085abf1833cf5137abf1ca5cdb2be. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZDA42555585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1591553f16f837408cd99a7fd2b57413c0402e099ab00f00675be95b106b1e3. 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/QZDA42555588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f9dc3e5b66d89ca413fe5abbe1673ede9b85da0143cc97229412b41b282d55. 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/QZTAT2520640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7b9da94c8135e3660f46b80da2ff45560e2ee756a23d50de837a150002ea5e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAT2520643.