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 0x9b26669ea72064b34d4040906b3fb7ad8bea36af84eb8c70607845855ad2a682. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c2c3565-84ee-41dd-846a-aefee2b1aa81.json and https://artists.proofprofile.net/proofs/artist/9c2c3565-84ee-41dd-846a-aefee2b1aa81.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 0x7764ecc8114ea172af56d3353d5ca4e05bdb908bc1301403e3e7875caac06c66. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:37Z), 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/HRA3H1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edcbf5629a515c57a45ed08419682f5d7b30ae190936ca6adb74139f95e2692. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HRA3H1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ce9f0747ccd834f6b5eabcf1d0b60124e4adf7948122422a36ae41fc469d0a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/HRA3H1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea2eb8bc949f3ab6dc6bc6944acbe399efb2338f0335e6f1a03a9cf35a191a0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:24Z), 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/HRA3H1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1070d94121ea5e3b974277c96ec43bff55446b9180df0def4b96ec0e23940ecc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/HRA3H2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e5956307f18f3d5da88070e93a692901290c3d3f0cc9b8fef8a548f754fd59. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:07:19Z), 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/HRA3H2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1abca1fdc0ed2abbcafadf75e8fa0ff5c80199fb7d4e6839e048fb785c8d4e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/HRA3H2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a3d80f8d2682b44ddd792b9a91f647a7c62dac75c3906ff6be047868b97789. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HRA3H2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c2b61d1c51b8472ddf61cd61ea7c0e24e3d6ffc8e81ba1e1732ad2e564725d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/HRA3H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817f2e0090cd6e860d7234aee3f84925e7efcdc53745c104170f4724373603d3. 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/HRA3H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe8938f1bb9d1384074c91fe86592dd65f19e8043f40f73cf537fb260b69136. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:56Z), 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/DGA0H2441515.