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 0x6dd1df0d89066465c1d8ca93b4a678505377476d2954ddb91229d918ce01d7ad. 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/2b2ebb8e-e187-40a3-b08b-434fea3403a6.json and https://artists.proofprofile.net/proofs/artist/2b2ebb8e-e187-40a3-b08b-434fea3403a6.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 0x4eefabccb944e1a9634867563eb12ec5cbe642f797b4e1fbd36766bbe13196e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGB2294307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d82905f93d3a660c4cf329e91d05cc7f8202d7e5cae00a30ae3a3b1d7f7183. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2050997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46120570d7d232757c9452ef57c57b94fc79cab2fb158c2448e30254c5ce7437. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAET2027429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63026eef36d2e0f99a1bf530c96b763475ec20bd40f61984edb68321243f4e4e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEN1915806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d9e560787f3348ec64812fae613b58f1658fe05ea471cc92fa3f7ee7ac3150. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEN1915807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a21208287153b654defcca037292b76c5346975b25846af90706bfb644e817. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEN1915809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39690bfe326107ba88a11ffe0cb0356b310b2b35cc751a993da768753567539b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEN1915815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d2a4b256f11616b4dfef2c7849ad3a582d7cc1473faf6c6dfd8bf46176f712. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEN1915817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252ccc07e26595f44ced1d281ff88a97285e51132c72ab325b1c2a74364a7fc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEN1915842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0b4d2ab813a0108e79471d2fa9a55741de6134da5776a1ca73085fb89db1cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEN1915870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e615eb6be6bebafd9a4b1750a29d1ce71c4a9a329302a5bf79030e82d60d11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEN1915874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67da875362771cccaaef3bdfa0a2261677db067487e17cb447175d35282883e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEN1915902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56dbc2735a713d5d4b5a3946e3c908ef2f416c19d45666505899957fe7e88e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEN1915903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1c78116f52ac6349add7b25f134a457a34a29ad149452693dfca9839e581bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEN1915918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dfaad50f123c833b29c210451c664ad4a1980393c7bd7163973aabcb5af9f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACX1751001.