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 0xb505f8236317cb40baaf7664952542c51b8df540bfef7a9a7ed5e696d573e0cf. 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/2964cd06-0d8a-4d8d-a520-cbf01b8ea7f4.json and https://artists.proofprofile.net/proofs/artist/2964cd06-0d8a-4d8d-a520-cbf01b8ea7f4.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 0xde7c4ccc00098e67932397fca172d42d33003be8ba044ee23924e7925ca633f1. 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/QZNWR2068112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096178649921666198d00623e0ac388db95753f40ef9d0642d672b5862fac6bc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWR2068113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32b3d4e6f8f5782f205ca05f17435ca9ef280c5f0ad9e22e1958dbc95e4874c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN32161925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98ca5672342a86034ea19e1bc7f908ca9a85d0d9590fed1279b79c657b5daef. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZHN32161926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86ea65dc5f08edffa095153d0e091b17a271c704e2b0572d438e810a6aa39d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES52183805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809653b75adeb19b28a5661bfabaddfee6b5d32fb80d658b51d285ef527eb082. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES52177373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf204276292b80506e90096ae9f9fc678a205db9ac3c78b250cb11ab440f59510. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZES62252039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2bf7a0e6c01d9bd8086a6e9e0d83b739b7e8b078355f99841d9c868ec3a2a7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32250225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdad32b7713afc8523c813f52ff835cc6c29dad1d9b26718f3d7401bf58ec851. 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/QZMHL2258413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08de5b147a4e89e44a3c5b8fdd81017c9e6c957c6ce55381df72ea1219596285. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:16:11Z), 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/QZMHL2249448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ca21e41765a0532644347d583f40a097996774df1899b727b3b0632f284832. 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/QZS642225654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2914750591c17b59c06ee270c1d419aecb5bc7fb18b981ed585518a4639e0c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZMHK2375145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff89f1fe33ed3f00dc242c7222814366a923cfb8cd7016d48696f3f247e4f14. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMHP2303672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32b3d4e6f8f5782f205ca05f17435ca9ef280c5f0ad9e22e1958dbc95e4874c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN32161925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86ea65dc5f08edffa095153d0e091b17a271c704e2b0572d438e810a6aa39d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZES52183805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66dc39dedb920fd27b2697d2c3ab930b70b8e1ed85d5e68601ea2a46036fad9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS632300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01255d50f30a39e8d53cbf3faf9b6d0fd8173c04347d188595f625ce8347676d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMHN2311763.