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 0x5b673bd4f0c488d0ee30c287a03058d53d8a5278406144fcc3f29e0cbff75d1b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99424c4f-02c9-4ff5-b7ff-66d6f999acdc.json and https://artists.proofprofile.net/proofs/artist/99424c4f-02c9-4ff5-b7ff-66d6f999acdc.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 0xba6ca29574f75eb904f0bf447d610062b8de2c89762fc74f10da4afa5f12af97. 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/USHM92049140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70a7b2d310014e9921fc7b0a1cd523e1a66103c4c5585ebb1f781b9b2860812. 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/USHM92049141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9558756190c20bf1306d441b2513736e45e0c3d6ab963645d1cc6290c71a2afd. 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/USHM92049139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf15d8599db53b5e63b17eee8fa877ef2393a1e19f7c4c74b79847e2587ac63. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USHM92066723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112bba868be7a8664ffb270f9ec0d2e5f6cdc3c09c2e63729e3bc158fd6edf05. 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/USHM92062642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09396a9820faf5c93865eddc0bcf2e6ce16858aedab02606b3c8402f11383456. 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/USHM92075176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11deb3ef77143f2188ba910a8999e1730608225cd34ab73009ac87abc4a61358. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USL4R2096799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff89e72357ce0c5a01cc3cc38ff1100631ee2b342606ee8755663305335918. 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/USX9P2032348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd45d2fefa28f63175550071f071893dc11d76d2c8df7858c6bacde01acdec. 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/USCGH2138935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac85fde7f331cb432c3b8efc20f349f288393c1d2ab5d469115de72b59d1bf. 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/USCGH2144958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff372bfdd933f79e444b730b7174472807692c38a2934e287ba86579e495618d. 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/USCGH2157253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da7f6925fa889118ff385e6cdbb2b8f1221b1710f950bec201ac1aed18f8c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGJ2186073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce2b5c65802c09f0c69e8a8b01061e818b60f06a1a0a88048d6d816444880d. 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/USCGJ2186087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb05cef1927d50dcbf666543b68cf000be9c51c510e68008e6bb9eecc9a19195. 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/USHM22127984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7bb291dc57fdcb3bbf4e7c67b313a91f4d2d8d48bc2eed24a3740b6560cdbe. 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/USHM22125699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8754b7d7006d2e999af7530d11cfcf1b222f9abef44fd858c48add17bc31c94. 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/USHM82130598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a17688b50b9bc2a2955886a3ec67f58bc48258315a8d8a7cbb0248023e1d411. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USHM82166788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32de68cd263611d2f9b7e7c5b25942e0e3dbad84133a257cd1d1a7b8c948667c. 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/MXD782202779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94928cf71bc579b9ca53b6a8558c99a2ea767c8ead417bd3c8e1a1b87b13dc6a. 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/MXD782202798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee6cf456746b7c0895af4a4365e4220c6a9807c25b7f16082a04c50311d9a25. 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/MXD782203994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec193abb5cdc60e8ce3eb273f7b2ab1f0e29ae674dedf9033d21c2e5a1d413. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBE2407874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec193abb5cdc60e8ce3eb273f7b2ab1f0e29ae674dedf9033d21c2e5a1d413. 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/QZTBE2407874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74f66511979e849e47f017395789214ee150ea46cb895fdb6fbb48739fe2c2. 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/QZWFH2402294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6587a95e6c3648f9a0302a58a73183fa4aa84c4a24f7ab1e6da7197878ff682. 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/QZWFH2402295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0f6832c043ebbe90009da712a415e4dac3ddf5768acdec34f07fa1495fcfb4. 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/QZWFH2402296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13da59d157503ec68a4f3ad3d1eaa577d26bca0196bf357eefbc24c2f514769d. 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/QZWFH2402297.