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 0x205426ba686621d8bc1b55ebeff6733e2dd9f5ecc3e13f7831a2e7802ba63d41. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97effb1f-c71a-4946-8af1-4da41cd18773.json and https://artists.proofprofile.net/proofs/artist/97effb1f-c71a-4946-8af1-4da41cd18773.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 0x350d88d9f1ad4d4fabddbd1141398b3ebb74369cb33ac551886e8cacfcf23e35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IT7DQ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b746cdf3b9c5d2aab22fff686195120f1fdd5f4ad9eb62a730e3be3713f0f9. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:38:31Z), 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/IT7DQ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e30bfc8749d3083e16b91d5a88f057cb25e98286f85efa02ceba84ac2f7d96. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IT7DQ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45feafc7a989f1648baa6bdaaa853b1314bec88e85ca200d36cfaf095dca5a3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:03:02Z), 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/DGA0L2312643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e6736a3a981ab7624d8263d4fc1da10af7b0fa768b5303635f8d1135eee99c. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/IT7DQ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9989897387f2acb212bd1aaa05cff8535f201d3d4912961dff85e4f71c3c1e36. 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/IT7DQ2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962979bc1116df629d1f72f80d14db90188cc562b61a0f67d7373ecfd1a49972. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:44:16Z), 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/IT7DQ2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350d88d9f1ad4d4fabddbd1141398b3ebb74369cb33ac551886e8cacfcf23e35. 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/IT7DQ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f18269f0075dfe6797bea89821dee6da34da03ef818e5b9e5353fdca268fdb. 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/IT7DQ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aeabf5d329ef653e70ca604bcab75b9ab7ce9532fe79fc15fd9fb5a378283d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IT7DQ2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4693cace06b8c3690706d8d3b346c784dba01c3b276ef5fdb5c010d297ac270. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:56Z), 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/IT7DQ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf26c1306290e9c211e837b70e0e5a013a6f147194d578d5530e30b70e62ac3. 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/ITAXQ2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255644a043301e16d3530900a7326ab73926676ec9ff93bf1d53eeb12126dd2b. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ITAXQ2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255644a043301e16d3530900a7326ab73926676ec9ff93bf1d53eeb12126dd2b. 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/ITAXQ2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e00ec44942ca8dba12e8270c99d8986e2379449d876ddf86803c26461fc6e1. 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/ITAXQ2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf468b2d202ae35a02aa11c105c3136d50d9d6016b5e1d34ddda58325715a66de. 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/ITAXQ2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255644a043301e16d3530900a7326ab73926676ec9ff93bf1d53eeb12126dd2b. 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/ITAXQ2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e00ec44942ca8dba12e8270c99d8986e2379449d876ddf86803c26461fc6e1. 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/ITAXQ2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf468b2d202ae35a02aa11c105c3136d50d9d6016b5e1d34ddda58325715a66de. 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/ITAXQ2500038.