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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 0x8961b8b6a275aec439cc81c4940bcac19deeba69b1e8639238ceaf574419d50e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c9d2b47-59d4-47f1-8e1c-4a8e34c6e990.json and https://artists.proofprofile.net/proofs/artist/9c9d2b47-59d4-47f1-8e1c-4a8e34c6e990.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 0x28920f5176c97fcea3277db9eae6d0fbe5e5c26b9c90fc86e6245d172784ae31. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/CAG880899408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b61d17624047d91f2f9e0c1043e664145a9b8bc1a970af5f26d138318b34895. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CAG880899701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8a180c1139285fe7543f1b161febbaecfc149f8f7ebb627a3a6a7c099a30cf. 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/CAG880899702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ace7ca24d8d3d55a7887ba39ebea05c1a1b7861f259afc469200765009bb2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAG880899707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcd4396173975f3f214c2fe1aee19c52937ffb7f6dfb3179066d5030c37a505. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:52Z), 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/CAG881599012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2f1eddcb7017f1f6879dd37688d9f35aefb4ed4b58464b471d626dc78636d5. 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/CARA80300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e8e48d175c72fff51e71005bbb1d367236af66378cff4b488e719def0c59b7. 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/CARA80300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe64b1e169f90777312b635d651ac23523882207983b7ddabe3da9013c489c61. 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/CARA80300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d43bb307c0cb4deb62f3c6565ae2c4878659e56e29bc43ea2261bc306e06555. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CARA80300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8104981e789b5ad06a94592ed6ff6ff03d769d9a324431f3a4b49ed459e6e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CARA80300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db10f4c7b9cb61675cc7b7ee7942431c36c3ad39b58c4dfcbd38b47ddbf8fed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CARA80300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aade7de4290aa0ecaa63932e97db80a8716b0d4ab38023690c9f58d8fc9c5f3. 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/CARA80300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd29c1b1ac375716864afaedee0778685b0a9f21feae9f4e2bb901b6e84c1a10. 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/CARA80300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd057d708fa8b084bd0b20389e1f39dafbc34931f0291039285245a0e305f5c6. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CARA80300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ba60da8f34e0495c61f4529ee08390c7e507cc248484afe237781cbfcbfd24. 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/CARA80300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef20531910e46240f0bdaf6b80915a2e75b3cc8ff283786f9bcbc9bdc0ed969. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/CAG881100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5ca5b130fbbc8b790c682bbdd969e8fa45f6bff0e27b001e227dfe8adb68f8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:25:19Z), 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/CADC41512664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6890ee81d7a63a1b76281a91cd04f433edf24321cda0e05ec654e30174f533. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:49:26Z), 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/CADC41512665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8149f07a91cd4b6335797554d6cdab0ff6efb3a00fc6a93fb88476b5218afcd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAG882500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa633e6bfc3b516aa62e530fcab64674602256f37c371d05ab0770bc547e069e6. 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/CAG882500003.