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 0x993133e99e10afd7690e4f203c24d6b7ecf5701ff9cf282f971796a6de3c259a. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3a53730-1050-43a9-a685-8b63953459b7.json and https://artists.proofprofile.net/proofs/artist/c3a53730-1050-43a9-a685-8b63953459b7.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 0x2de53c3c24caeeb569b5cef867dc3c09c74d4d50098cda75b196f8106277c9d0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:32:01Z), 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/QZDA42476384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e1488e74604334ff5afb34522e0db79d7665d629ff65699c28207ea5d5899e. 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/QM6MZ2185299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bf3a949f7866c067a999eb47a6de81d29f3d89620a7404d38d7f33369f8ba4. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QM6MZ2185301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5537235b7af1e78c981d19113a77eebc3733fe39dab949020b59670e22752e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMMUK1800151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96724489bd9ef13886f7cd531b50c7b5da21b488f265b3fa357039eb775d8d4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6MZ2185305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03da806333ebab96e10aeace88bdaa2af45aa600cf1d790a4eaa7d88ed139d3. 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/QM6MZ2185308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bf3a949f7866c067a999eb47a6de81d29f3d89620a7404d38d7f33369f8ba4. 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/QM6MZ2185301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e1488e74604334ff5afb34522e0db79d7665d629ff65699c28207ea5d5899e. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QM6MZ2185299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5537235b7af1e78c981d19113a77eebc3733fe39dab949020b59670e22752e. 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/QMMUK1800151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c34239598f56bddb6c37348b50e1293f12ad73cf0365dabf3d3e25ad4329bc8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMMUK1700494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a1ce4a75704f06d9b3035c04d2c806ecd2a804e75ffebf037b2f8db3c13daa. 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/QMMUK1900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9025fc7fbdc7d648306de68803b804a015203d03905475c9bf59754266d5e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542304810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a35eb92a273be23123ef00b8005082e9e0662fc6bb5a739715a5cc5dc69e69. 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/CH6542304866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0897d549f25079d4da1649978e888d4689d98261ffde751222e08fd4c031e9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH6542304816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98490681eeea0781385b488169c3ff7f4b910a2f2ade051a281e77414b3f643. 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/CH6542304813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf2324769c56123b4011547d009672d5319b20cfb199dece10a37e4a02422e7. 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/CH6542304815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8078371eb0a65b44a2b7ad57360b1a1cf11157eded65740d0050deaefc65f7. 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/CH6542304818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce8f4171258803c94bc9937173c4bf74aecdbd8fc60a27753cbced952d9f2f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/CH6542302248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeea066f72c631ced3b42b3ed434167f70fa042bb92db4677afb5c9ac2ec5e30. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542304812.