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 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 0x25c1e0899fa1e4fe1c205a3ef473fb4020063c3b1b0652dcf53419e587b72835. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebfad129-7717-46aa-bebf-3d91bf80d9f4.json and https://artists.proofprofile.net/proofs/artist/ebfad129-7717-46aa-bebf-3d91bf80d9f4.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 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 0xbafe762fd8c63cb942954a7513862c0510e77af7d5e5845e70070aedc96d2a63. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092228686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c545fa2a18995891b504ef7ce4bb88d3996743c11ae37ead97216be282c1b79. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2243810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401b1ead981189a55e60365d5d3355e4643d447f157caff346c126bc1dafced. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2243809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafe762fd8c63cb942954a7513862c0510e77af7d5e5845e70070aedc96d2a63. 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/DGA092228686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1e9ff5397acf38a176fba28671cdd7605789df9788ee07047c6d800771a3f8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6XY2532544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3af441a4d1218faaad8d21c80192f6d68be870ec8009b7f4b7d5f0c74421e1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:25Z), 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/SE6XY2543869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0205c4877cc4769873cbd8906925f21fc728fda943463fd5c5b343f23b86280. 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/SE6XY2563528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14ba76145e0ac91a79b83713b94735480c4f6c556cbed326d2ce631fdcc0ba. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6XY2563509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc396a4ba4246134004cd7e625cd35717b7e259fcbfb76d97bb4ae97f9243dd52. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE6XY2540605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14ba76145e0ac91a79b83713b94735480c4f6c556cbed326d2ce631fdcc0ba. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:33Z), 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/SE6XY2563509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6150e5099a96a0a3c627f7701ea87b55dd1b5d0e7f9fa1f97a40677b4c1a0ed. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6XY2563572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be6c31cb92d13dab4f3fe78ea5dbb6e983cfaf658ec65d50d2e682b48f931b2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/SE6XY2565264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dc0b28bbc44f6784d8de7f5352d50a9e1cf6c9a995e0688c80f5d952927162. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/SE6XY2564479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce18e793ad20ccabd0593f1a5f90d09bd3d548b152ffd81d54722a0adf93125c. 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/SE6XY2565109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27cf6fb78219afc76fa51288347bc604fe57315e069c4944761645caabb0689. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE6XY2564542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3881b0d30d32efc4f0ae20936f8af81c78b01b07c3ec43ad923578a57e4b079. 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/SE6XY2580873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4aa520fee37e7f99abfc9f66a3c98d7866dcd20a95a845b52e21b4b503070d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2583454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3881b0d30d32efc4f0ae20936f8af81c78b01b07c3ec43ad923578a57e4b079. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6XY2580873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf346bf3b47919da4bf8f8ab5720e3ebda6af37fe5603dff956a58d1a37cbee9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6XY2581339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf804991db802bca00f4d3a5994071a044c85765cd50d7889e6482b74408eec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:21Z), 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/SE6XY2564609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf804991db802bca00f4d3a5994071a044c85765cd50d7889e6482b74408eec. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:34:31Z), 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/SE6XY2564609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b526cb9464e6df1f1c4f46a979bbc916edcaaaf369fda96442c46c4ae61799. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6XY2588043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9315e01151f00d4acdb15381373a3d7154e36b6f0864bb5e518a1809aa03e3. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SE6XY2587869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fd6c4057c635f4bb0325bb44d49bd49b670d4a0108f692d9085d6d6cf028bb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:33:14Z), 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/SE6XY2593764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac28160acb9f9866ad02d28d7d10b87a6b7cffce83e00a68fb3b0f9c0716b88. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6XY2564600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89dc9817287e78853acdb5c4fb6fc5469618b4df321bb5801e7d669b32cf304. 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/SE6XY2593762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae34c5c21883ff9411b236a3d211ca36b6ee9a4dbcfa8035e99d0176ed30ef5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6XY2595498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0b6c897326a7903968fc1f553f5ceaa25bcf6311007f5fe8ed6c0b9d9ed1d7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE6XY2595334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf346bf3b47919da4bf8f8ab5720e3ebda6af37fe5603dff956a58d1a37cbee9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6XY2581339.