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 0x9a39d08ea02ed3879b1752ec1e0d6620ed4b65669b3e8626edb31c75aef0a900. 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/732f16f8-ddf6-406e-9358-474cdca4825c.json and https://artists.proofprofile.net/proofs/artist/732f16f8-ddf6-406e-9358-474cdca4825c.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 0x2251bcb0d194fcb66f764fac9d0d4a3cfeeb01e8d09c6eba914ecb530963ab33. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ2503983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96009b2bcf47e7fd8ba87f0ee89b366c26ddb68ad9adf232ba832d0c548fb9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM6MZ2503986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a734ceb3c682283da3eedcefb1fd9ae51820a9fa064508b04bd5176f4fcf226. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6MZ2503987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb8e2bd28803cf0bf130e32b7ff0f92a29b22210a6e32bc5cf57f49a59f1f2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:53:24Z), 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/QM6MZ2503989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafef4f2fbc9f0b84f140ce603df736adc59b237bd9b2044fd6f2b742e3cd7d72. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QM6MZ2503990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4320bf9c85f83ba205a765c394f9363edc7074168c74af6b91251ae5aa0de4. 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/QM6MZ2503991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe446f2ada2ff25e93c4b6813fc94cbeaedaeb6eeee54643e251779877630cc4d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM6MZ2503993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e2d066a4d82ebea693b6323a6e46db3ef968b211afd3e695d31752fad5e293. 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/QM6MZ2503994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36482d3d96ddbf7f087ae4ea5f0eac497c8bce21f195df882e7f832488e9522. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QM6N22575509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35c63502f41c270dbe70afc43ccb7eb461b855816003ee36b0d5d65b25cf486. 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/QM6N22575526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15be9705c79d40c47ccfca38629ceb8854b6a8bb9b14c0f1a5444e5d560b529. 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/QM6N22575514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a0ae8aad1053ad422d6104ba6d100f2932267b6b3438f6826c533f4ae86791. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QM6N22575533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2024ad9ec652f6a8db9f40ff6db4af386954e8111934f7d6a7a13895238734. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QM6N22575519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578c6af99bd402c93cacaf143d4fb8baf6b0c68e81db7a026dbaccdddee0223. 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/QM6N22575520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f378750d1078f1c449ca43440f5f6a452b642a12019bf252b43d6b73087aa. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM6N22575522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654b11e6ea9ab1b175494923b50a083eb3296fa897eac24356b39c17fdc07eeb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM6N22575540.