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 0x5b7610b7a6a9bef5c27136f2ae1336c3bebf774fdae5cc515edbcc69e621120c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04e67bf7-b459-4b49-80b1-abdfcac1848e.json and https://artists.proofprofile.net/proofs/artist/04e67bf7-b459-4b49-80b1-abdfcac1848e.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 0x466723d8fae46b3e7a166c9775880067e710ba13cb3826d3a6fff53a2b97e57b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:48Z), 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/USZUP1012168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c65eb4c9072b136d34a86c257d3d1257dff36163a1bcb0828b69847519167b. 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/USZUP1012169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa136624f1b3088f19bc173a0350ef6b5b17ef571e7787a7f71eaf76294943896. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:14:01Z), 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/USZUP1012173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc64ff43596846b40c761eda570a092a7cf38bc02f2e9e0f9017c1ec7dfd223. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USZUP1012152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a0303667722da11f4cf75d5529c811e8666baefe04f9027ad468e2dc891e76. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USZUP1012138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb18efddbdc8e492663497e3a9db543222315369801ae0588a84037140e74975. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USJ939770086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405334179fc94fd9abbe92b3b7b01dd83960c14130ace17e8df9b7a8b033f387. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:26:41Z), 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/USJ939770094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e7cdf67082b4e4fe11ab7ded060341574c00e44c7af5aab89d944dc9b4daa. 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/USJ939770095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b5b38052ef082bf6c3f8dad36578cf22992bbf5fc6d1388ec4987752402d58. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USJ939770096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f0e5cb1e6f2bb938c7e3e2b2ae8ada24f466343342bfcee2c6a15255694f69. 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/USJ939770099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39af7ebde73221cae339cf7c2df18ba0352876797dc1ab2cc3b6b7d96d3abc3. 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/QM6MZ1503711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b677ec7b39bc63b626e96f0aa414c9dc6bc45c8234ac5c3f26b27e87b415f9f. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USJ3V1123392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8731137f6e1f6ddc19fdbbc12be0d7e861c99a920f8898c2f7b8e691a0c22a30. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:20Z), 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/USJ3V1123395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f8077c87b4ea8575630bc591695421f488bf99e22034780bc4d3800a17a7c5. 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/USJ3V1123398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7515905be1874cdb56cb13b68c2f371212be222717d5d7821ea7c81a58f95425. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USJ3V1123401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bb282791e9fd160f8ec72ef43c2771229d830742347ed9e20714a1fd6546a3. 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/USJ3V1123406.