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 0x9380a70411107644b81fa49c9c4195229c1ebed949ef9004b4b955705bb15475. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c6540b6-0fc3-459f-a7ec-a914ee3540c2.json and https://artists.proofprofile.net/proofs/artist/5c6540b6-0fc3-459f-a7ec-a914ee3540c2.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 0xc6183c885b4739276600aeabc2992bcf0dc2ba2b13517e6268449ea48488e8cd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMER2517239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a909e87e03a2ae48eb40d70661bb0305b72a98244f8511e959661b033f1597. 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/QZMER2517240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33612028d27f48f790d2a57ec16a7be393960fe985b1f20a247c10650a943bac. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:39Z), 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/QZMEQ2594974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90625e3e00f520a21dd2269fee07c35804dac021ba40123e87aa941f3970767. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMER2515259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7132f2c7005da62877028fdc0b9766171ff9fdabf56c5e63b03ff79f05485779. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWS2547396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07aa53a76e5cad46cdf29391aae27ca6c3200f0cf993994c08cce70f55fc376. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:21Z), 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/QZNWS2547273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72e16c29689873470e1c8412a3dec15df627405d1cc444faca4af7d650eac59. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWS2550836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35373d0314662595ac35954e8ad0b323835022b539ba3c1e3ddaf07e40b5273d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWS2550827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4411dd10979fc5f6e9d89b62412d4c68c219ce71ebf4a7ea5bbb626a5caceb4b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWS2558097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8141b4cee328c1d8473326b8dd9ce75f4c0c485ad4cce3eca166cc748edc8ae. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWT2539113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a4291836323c11f05af5885bcd27cae6ca07c54d659f5c89a8f1388d8b9df8. 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/QZWFM2531006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ccbcb18a150814f01769f68f620fa1efde8574636b80826817d4165d4c4fb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFM2530957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5833529e2892c891706b11f50eb2ad5d6831ef3ca7e7b80bc2dcf1de52b4b796. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFM2543146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17f9b6ad5db0ffd1625fbc5d201ed0f6427a8c9a5ccb006f8b4315b6fe2005a. 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/QZWFM2584221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2810c494e8307f639ed47450ba1b6c6ead4789911c5a1f2ffa1361d892225f. 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/QZWFM2559938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c543da69261caac0692a828d663b7a1fb467dcdc5820fddcaa1cd8c968dd3e9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFM2577968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70c815f3b93a72c20714f91c4e6f44ede5289dc1fa0d2c65c43cbeadea7b3fb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFM2559934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2c983088bbbcf3608db25ad261186af59e5a1937aa206a992b48187586daa9. 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/QZWFM2559908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385f1f765552db0ea20f1825b3cd3bde73e2f09aa28143966606e15a2b688f25. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:54Z), 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/QT3F72561651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eb7d02a44e40c647c9480fce858a9e1df6dc9e1ad2eee1ca17d512e4cde6ac. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT6E52578888.