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 0xe2fd949606caa640bb4ff4c57819925f302ff424cbcc083bc3f28936c3df5547. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de8f6c5e-124b-4e52-8f71-82d2f38f84c7.json and https://artists.proofprofile.net/proofs/artist/de8f6c5e-124b-4e52-8f71-82d2f38f84c7.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 0x0dfba89ff92365272950a5b8626b7b38533f177694b954601ceb2694bfe4d4ac. 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/USHM81190970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4f249c96b3d9fe37f83770398d6edaf99d63325566a99c31ab18d973fdfabc. 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/USHM81190971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1615fb131f49bda1ce5ec03007887269e4f22068282be9a3f2679b152f22a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM81190975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dad6cd43daa5a402567240135e91bfbf5eb43685e6b3df758ac41dde72389e5. 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/USHM81190976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac832fc1b797692bd34984edd639f6a1d68517315b2deff047fcd914495c264. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM81190979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71db4f138ecdb69b3544ad5ab06801b3386ca212e29bcf44cdd3e00805dc724. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USHM81190974.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8448ef25bc09621586770dc6288750009916c987086588a89a61e18b128b724. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM81190972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f77e8a235179ab18c4f29bea278514908451440081608da0514855d99a4bf45. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM81190973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e309d83d7ab0c4549de0145bfc7b243564171c4d794d74e423d683401976532. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM81190982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409052189496c3728d7e01cb6ded075b0b06d8df4b719baab6de1999e9643f68. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM81190983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef1994d6cb894bbd7eb091695f76065ab55d1067bb1e2d268aa413b426b4709. 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/USHM81114412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fdc00bc20f4cef4b0d21d475ec13057d044c5b6dd8a6055061de24471f64d8. 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/USHM81114413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d93f0295043543a4bc767c3b4c2667e0812fee7b2e6b3699dc1083228a6e52. 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/USHM81114414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc59c047b8e89c5de67ebcc551830b1a1e2dc7e67c621afe7745c26ca9351e3. 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/USHM81114416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c14951f8c2d8dc97659a8e5643e7043efef22071e497faf4b835a522af763e. 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/USHM81114417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0bd1357f1eafa8baa35535da00dc47759fe3da435a15f7c5e4af99742489e2. 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/USHM81114419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4762b2f377b158eaad1629bb6b80224f0c69c9c936babbbf40e0c48198e2ae2c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM81114411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153d2129ea062f616acf841bff7124cc0436db0a7974c4812a712fadc33ceea7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USHM81114418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0f60e6e2ea7d8689188cf1b307696613d70fd931cee22e97451015a8c9f2e2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM81114420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fdf13bde6ad0dda9c092de1f0e4945e2f466aab4e38bb36c88454c76ef7ef3. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USHM81114421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86650639bc718b01bb5301594a21b7575df22e47dc5719bf5d7eb6b6bd30cfe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM81114422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb3962c1b6808591f45e92aa20102818d23a5bd7803e54d98f40fdaabc6de20. 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/USCGJ1704179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa67c6184d50e07319455986f15d8d252ab439b08464d93fc4d0ba4b471ae55d. 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/BK4DA2307325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaab3108f9b5707f49167f80552e0f3b80be536b2b7803703effec0634863093. 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/BK4DA2307328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf24505eeaf721521e021b169058cf7e03e7690841e31e47e81b53165e6be4c. 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/BK4DA2307323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373216cb2d4d5529648299fa82dbb603e30418ca2ae7122878c8eeae6951cad3. 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/BK4DA2307327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ffa47c675f2e15c9daed0fe222d60522a18ad8d3ee99afc4b390318bf5dae6. 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/BK4DA2307329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7120848c1099ceb49fa8d4ff6574516a4d11543e944ae0829f466b444d4150f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:35:13Z), 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/BK4DA2307326.