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 0x883a48a56ae1cc7ef88ed8228fc3f019991faea7998178de4dea3e34cde5820f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63b3e934-4257-47fd-98f2-e82640355eb4.json and https://artists.proofprofile.net/proofs/artist/63b3e934-4257-47fd-98f2-e82640355eb4.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 0x597783696f3550361526e987cbc86faa8b3b0a6325b3f2a8a756a6e9ab7f37e2. 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/NL3AA2450044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4cc164ef4df21169aeace29f0b1b6e8ef1a439877e050082dcaff6094f4a6b. 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/USANG2246598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6e13c5ffe14c3992601ebc59bbd08206e046267a2a1879799a5dcb1538f80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2403354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70ee4317f9e68233a40a4ae0748a75689b5a021ff539dd1386a599a5c444378. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL3AA2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe039dab6fd548a1ed76386d730969c8fd37b933f762350984f2eca5d04e0705e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL3AA2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa8d56bd6999df85158b23dfde33fc4864d6223e80b200d8a4404396104fa2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL3AA2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe039dab6fd548a1ed76386d730969c8fd37b933f762350984f2eca5d04e0705e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL3AA2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801ee06494663491a093ed1a6db706f7a02673b00cda9e74f45dadecc3a6363d. 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/USANG2489810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa304b832c4e3207f78c3cdf283a00f2b6975f78e19aaa10c63b85b81a15c1560. 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/US23A1578610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca1fbccf7103f8a35e87c9e8eb0cea7d67b4db9c7cb6fadba006c5e2c93857. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US23A1578611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be0dcde60359dcb5c5749a04eff228c4cc32bf0795006c4426ae9d6abf68937. 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/US23A1578612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf60c379cd861eb471c1c21db100669724b8162c9ff8d6e9a9710ba8a9076eba. 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/US23A1578609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca1fbccf7103f8a35e87c9e8eb0cea7d67b4db9c7cb6fadba006c5e2c93857. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US23A1578611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3251118b43f2321306f374b42b2ed38e71bc3b90c30489d23f7646e9d6b8bd03. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DGA082205304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140f6ed95c98597848e6a88d5fb56c8cc4711d7eb5f21e4bc2f134028ca4763a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL3AA2250057.