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 0x312e68840e02c598eaba0b4facd1818985904be2987e941a6da6fddb1d6ae879. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6500fc3b-5758-46c6-ab9b-3e677c1fcd9b.json and https://artists.proofprofile.net/proofs/artist/6500fc3b-5758-46c6-ab9b-3e677c1fcd9b.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 0x9e87c0b2c24f2eebb942873bf9ad4a9fbfbebf5e16b034aac87ed66b268a1cd7. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/DGA072466800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1baa6ede3e3141a3d322b306c45521621232f39136e74b6723e158e0eaf13. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DGA072466801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f6f7a64abfd9866d5133e87aa8437b5edc8efc83135eebf09dbcbb7fe79e36. 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/DGA072466802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9a1be8281de2ebaccebba7b38d22e44c39c081b8e1adb0138d6d316a5dbbc6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA072466803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d9cb546b5b6b5b6caafad601134f7fe6a72700d9c6d84539b1ad53af3d1dfc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DGA072466804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c65e0de25c0bdeee06e0fe64b444276cb02299c3a9409fffe7c60cde2929e1. 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/DGA072466805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1331a1ab4011d045682b9f7b068b97f2d5945ffa227d9e6fce69264beca5a6a9. 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/DGA082417864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc923044bafe28faae8fb435338b13f2bf290bcdee8a9037153a6f276cfcee0f1. 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/DGA082417865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ccc3adc8f447781f8c332f232106721c532de3d235858f89826f770566e7ba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA082417866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dc53df1d5ca1060e64e4a59c34b123b964c756b65a8531ae728a21370c4d3f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA082417867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c10fb26d21018ea6cef4cd93791954a1da8e7107bc2c5134a48e2416f962506. 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/DGA082417868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e87c9820317ab71c583795a9425f42a060d368293fe64fef8742e821425e8f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA082417869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1c61d20efdd0675136991121e7b28ce9ff87811a753e1eb446f0b8fab8c39. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DGA082417870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57aafbe5a8c5b80a4505e59f7891a37b57642124e2a807d533175765b065f511. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DGA082417871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0c0e8a93cf77ba20cc2127260adf015d8d4fe19c45ab28343a25c89c45be76. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA082417872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bba820115258dfc25d70af49008d7709d2e6cc5630d9940e0353e2c2bbad4b1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA082417873.