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 0x0575798cd985737cd97377dfb66ca5ac2c299a25a27729ffec739b048f1a376f. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2183765-9f28-44f3-8a01-7d54f6e85703.json and https://artists.proofprofile.net/proofs/artist/e2183765-9f28-44f3-8a01-7d54f6e85703.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 0x4a7136e15ebc8a837b454e67785a95eca37daa0fea93ccd1f016306c4711a103. 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/USB4U2421001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa660bd99439e9e3819619953405625c2844626b63e2379513d9537a7595e7b2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:47Z), 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/USB4U2421007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e8c526f8cb3c017e4bd264d715780583237858853e4ab723dfc8f2cdf34163. 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/USB4U2421008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56a16d4e3efb175a2d1e3d6159b1839e1cd0d2f3a21f1b1214a129101f10773. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB4U2421011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb64452fee09d4821c0b0501513c820846e210002af0e9ee8223b25532b6d9. 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/USB4U2421012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482c70a197c1d1d1bd24fd8dec6c775e00f657c71a4ed4cd1d145933d9094afe. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USB4U2421002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe150e245c57229c5faa44102640c1963b84dc5e8ed628d81eab6c70cfc988506. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:57Z), 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/USB4U2421003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab90a88adbb991e71dc4920d8e8b6e4342481fe447d02c7131f4107936624d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB4U2320102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5751326f329a8e5d778c4c594930a624b8631b4d5b7a07faf821463257f70e. 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/USB4U2320106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530d589cdcf102c0e6c819d04b2293c5edbc577ebe5bf75950054db61ede7e90. 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/USB4U2320107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124198bf9913788b1043575e3c579824a21d3b83221e3b38c669872cd3e6838a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USB4U2320103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60084f0f27e0cc2273f6cd36a0fb96ec267b42c7cb0a0f9b9be95d9e8c3ed25a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB4U2290101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565584bd025d7d6dd58ebfb5ca4deb1c4f85b68b42346ba83873bc20d426adce. 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/USB4U2290105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9091c2e77dd76137d3bf6b4ea2f26ed3746b7976d2e57101592ee04fdc378f. 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/USB4U2290107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb5292ae023a9ab20eac337e487f8bd16390d702c902484a17ff106c1cfe3d3. 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/USB4U2290109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f368251da9fafaafd218d8f0dafcff4b4ddcb326b5c8715c52cc3280e506bc. 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/USB4U2290111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05191f9ea3344716259044c4609c3370da7384048c2703e6b863569844529214. 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/USB4U2290112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2048a48c55658f02c309c4666416d9e5a1325996d76e57a0f899c7e75c0ad69. 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/USB4U2290113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb683164c9fc2caa188b3e1914eb5f0248fc6dad8cc82f180f1b855f6a4f989. 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/USB4U2290115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa660bd99439e9e3819619953405625c2844626b63e2379513d9537a7595e7b2f. 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/USB4U2421007.