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 0xf6347572a92bb1a8381d536ff6558938908d3e6b27c791f1aed8b0b762f43764. 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/894ec992-5855-4727-9d7b-f88965c44369.json and https://artists.proofprofile.net/proofs/artist/894ec992-5855-4727-9d7b-f88965c44369.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 0x0be2c28493e6017a8567fe7743db01ddf33a0d835dcd7a3e7ce1c93cbe20d463. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZAPG1800273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a860fc1624cf20a2d98e333b382984d799a00700d2d72b006a00819ce4f8cf. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:10:00Z), 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/TCADE1764753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeec00edf1356a2d08c9780d665a313dcd163d17cad776cca467290f9f5700dd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCADG1727300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bad0a14a0f4f793ccabc855557455aa02c3e646a0bcb6ae0a0ba79591a353d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZ9Y21768941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff9c1af1698b33908bdc9b2242bb80060376825dd535b04b35f69f9de110004. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM4DW1828422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb385b8d199e63d36b9d9a690698a67a75972ce47b9d25d0e137bd6b8e7625d87. 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/TCADX1825932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fae7b8bd75e0769b9a1c2e8f6d67edeba2aa830fe64031d04a21ca570b7bd4a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:55Z), 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/QZES71870621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4bec894227727d3f438d8f320aa83b6a97af6668ede0392d73126db8e68fd9. 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/QZDA51970970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a60455a79f26e9ca723fdca626d274f6f52e004d6e77df25a71947883d75e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA61904289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29c97aac698f61e8219a893f99573dfb73b6039a270208fe27d77ed7ceb311d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA81921475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a5232097bc8b635082b60c9070840ad65c6bd9dc9c6f200a8fa95158b96eaf. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:56:25Z), 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/GBSMU6218990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef336c9bef8a0511104bfbc21d249452dd31c8660727a4ff499a30b3d44b95f. 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/QZES61933920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7778a081ef5574332bc31a642e1a73b94e0edecbc1971378c374109385c53. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:04:03Z), 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/QZFYY1947970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe571a6936715139c0b960495af05d3f153ceb536695c5d87586b28703743dd0c. 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/QZHN51981064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b65cd13d8f0d9420133bff42abf31e6b7c92d230383650ed45bd3b8b96cc55. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:22:43Z), 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/QZFYZ2086358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4c33f6c71bcec52686dafde1089abf24af0e2a55339cb18263b4db6d46dd54. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ62070961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41df478cc0c12ea1e3c91c6189d6afa8321c5f34b2a1ef1d73a53c812813296. 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/QZK6M2048487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9032f924d4bf7e5fff210e9f9f5c575e943c5e5b1825b1fcbbe4e889891baa1f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6F2010478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7b81f54cb452bb8e481ab2942911063b0d3ed1b4a6bb1f7b51a33f60a110f7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:02:00Z), 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/QZMEM2033743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73405d067c57c831bcb4c47cad767474ad59c17412c2a2e9956711647b0d675b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWT2089727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1592d72d671b708e4b80c7929dfb437db19461bd966c4130e31829b19234b5. 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/QZDA62138511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64d06eb660add35cc4b87d3b1d386e6faffdc1b6a1b0910f9c005d534c37a8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ792585857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df31575918c26a63d3eb5265348a6c614fc04bc94b1dc842d1380b08b550649. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL2138362.