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 0xb2def82f634ed271dfe1e7346e28d9b595a7b351d61adae3ba0ca6186acec59d. 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/236313dd-c260-4d98-b3ff-5388018937c4.json and https://artists.proofprofile.net/proofs/artist/236313dd-c260-4d98-b3ff-5388018937c4.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 0xf39a93de7bd34c58b3dbe537b244845d20948f48cd581901f55898a6840055c9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US7VG1654182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba04e462f201347ff544cf33aaa547089d6a561419de93510eea1b2c07dba4. 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/BR4GA1800231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f055db2f87de3c9352b3a7dbe79bf24d0737f982cb0503e3a760739f3ae16d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BR4GA1800227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b914aa284028f2934e2560dc4e1b8e9971fff9d496f33cebc9814b7be04e49e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR4GA1800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854416d97b82df233be5cdbfdca69bf570a4ca96083cbb16d3f6499cbab3202d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR4GA1800234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58ba9a9bd75d24db0804fd6e2d08910b8c194c2b634ff462998571ff16fe05. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR4GA1800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9f7f0f8214ad8ec785fdb3f9075a5cfbe4b1933831746d0a12f9c4a267692d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR4GA1800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ecf8f5856dbc2641a41764699df3cac2c6edc36a128ddbb03b435b3d4d9d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BR4GA2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0be7413f7fdec88b4895bd0c4c8a6086037201902c6856f86cf90bcc42e0f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR4GA2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ecf8f5856dbc2641a41764699df3cac2c6edc36a128ddbb03b435b3d4d9d1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR4GA2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91020fe1b2e7b161faa5113573ac7b01e4d34c6ec69aeef6102f5324c7f103b0. 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/BR4GA2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75894b998b91437f7212168ca73a2beb118281ed4ef88bfde5e699550e22768d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJY2109794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376b979144e1fee3644457bdf217cb75e7c0e5e89afdf3b6c3f0fde412b9239. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTVM2113121.