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 0x08e95d52552abc42756e90dd007942fc850cf7e851ed0d95078a0d13e0c9d39c. 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/84427d92-b04b-4bfc-ab44-13bed83ca28e.json and https://artists.proofprofile.net/proofs/artist/84427d92-b04b-4bfc-ab44-13bed83ca28e.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 0x48d1c5bed07430dc3a4d6e47112e07beb24e1fdbf807bcd4c8cd6815cde53c60. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:12:54Z), 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/QZGLM2232644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33573c56fca68b216f98d494c4b44e02f5e6e843d875dc80967c23e3fb7f8f87. 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/QZGLM2232645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8f37a42f4a01adfebb9621e9623661db15572f95c3a2124a407cf295ed1cb3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLM2232641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcfcb051be5450bd7f61e8675690ba9dcff7468fdb3919cf428cb8c6c0c0d35. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZGLM2232646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a4f0101475cd6a0ffb50fac6258e00aa41cd19906f980da2c483aef4c79ef. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZGLM2232643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4a5d8f3e29780ff0ff3410e303a10b9f3436cddacaac2c2388cc6bfe4e33c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZGLM2232639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5893a856408b8cafdf3a4a2e3a216d216b50976c03a190e8ee4f6007b10587. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:19Z), 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/QZGLM2232648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ae229ca137e4c9ead7b47b4b144628cecfcbafd4b40f784a956fcaf8cb7c2c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:38Z), 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/QZGLM2232647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e29a7024bf500312d20ca21b087da14cec4704d5f6671b3d5c1e9dbfe17d273. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:25:22Z), 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/QZHZ32290265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ac653e9d3d61ffd66b1324be06326ce96ce3a02157977836e3ab1206668327. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:44Z), 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/QZHZ32290266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3eb6d6e360cb9704214d0ad69ddc1ab961af3e9c01c86695cb6c0ff6339dae. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHZ32290268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fced4f1a4c27ddec409519065fa77e4617b648dcc042e3680d116a320781fe. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZHZ32290269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e795becd4019221819bd0123c1d1982645bd664b870e0df2a36d21839ddb74a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZHZ32290276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ef30caa6e37228f87b39a34070c2c2c9545f88fdce15d0cfdc8be06b947ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ32290277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1915c5e6fbcec5285dfa5877f2a8ac74159329d002dc3967e00d94af3b1bd. 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/QZHZ32290281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d59d3f95d849232f16af66034b67d8e6e8716a6c792195906c6695a7eb67ace. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTVM2434321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aac891977cda7889bdf73d5a527fa0307df8213cdf5b551e68b228dbcd8f38. 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/QZTVM2434323.