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 0x5b35b25c632d88c39d29362c09db37776dea3e54da86a24b91eb234ed1bb8574. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7539f742-c3c1-47a5-a0a3-b3bed447f132.json and https://artists.proofprofile.net/proofs/artist/7539f742-c3c1-47a5-a0a3-b3bed447f132.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 0x57ce1187ab23da00696c0b71327566903661af528cd96815f7400047ac59c430. 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/CH6552100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bed32f37d0c784706d98e607625e9df2f7c1e2ceed42e5afc508e9be3e2ece. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:09:26Z), 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/CH6552100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3148a75170a51342b07742d9eedd3cf725c9ab6295b052dd7355fe1f868fa857. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6552100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6da547c44c6308e75267ba3f2508486cf9044c6f348279b729be03bb08a208. 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/CH6552100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0749ef90927abff588d4a2871d54a6e9442fa46e86df7b429d7730d864ae130f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6552200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb427a0587a99566a525a481e73f3e10878388fb4768a3df24826c1ab8eac620b. 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/CH6552300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff0a57d2d8e2f899584f304a84b9a76b634b77739de9cad1333bbfc1351bac7. 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/CH6552300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6b526888f4609dc4360cecd70019f7b0fb8723a96ea2ca74636bc4e6dabe66. 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/CH6552300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a5116420a744da41f41fd3c7db8e9a43f92b5c764c80d00af86c6347c07182. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH6552300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25233e1e3bd11ab8e8611c50a2bf7d0ca04c977fec303eb862c9c7b48275398. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:52Z), 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/CH6552400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d57cc8e032eb529299b180c66312dba4e19d14cb8f3fe38c536c639e4f2b3c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH6552400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbb80bbdb734d48703e9bcc3975c12272407fb3df8ace3bfa660653dc221577. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CH6552400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f63b63c9eed26781a075801e76fb0a3b87a0f4a0381569133b30a0bb956adb. 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/CH6552400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34649be2e7824d37a3b1722f22bb57a4d9d38886fbb014f8282755b8047ade2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH6552500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fdc71f0ee59572d9403733201cb19e75faf49b78732be31c3cbb0e395628cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6552200301.