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 0xef5456fc415cd08a2f7605cbda9a17baeb5ea07a4f0af7aa58738c87da6bd42a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b29a5a33-9ab5-484e-b835-3c47a86a5c20.json and https://artists.proofprofile.net/proofs/artist/b29a5a33-9ab5-484e-b835-3c47a86a5c20.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 0xa168d774c19fcc21ffb337f3054aeb1bcab85c8c5cba2dc8dd3095320dacc69a. 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/QZNJY2347410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913783fc93083fc193c9083b962caeb4aad2a96b2836cb82f1ffbe420a27edb. 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/QZW9L2259264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e91b3d87aadd50ef5ea21319a04e002b2170500e50c2aea6f3c0cee26bf7914. 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/QZW9L2259265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6294c038991f9989641d6b0629f0968eddb15fb4aadf90c0d10ae974bd4cf8. 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/QZW9L2259266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1905f173f4d9cc967ad1b34899e1e1ed397c33c92d946e6e07f6277a09a850. 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/USI4R0800921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee496b781b0eceee443934106512812d7aa9ac85f1e4a41bd6bdfa7649a02ba. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T23:38:06Z), 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/USI4R0800922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1491d2aa3fdcfeab0d189584dee963ca85f85c49cdea1e76d2b3780fd1aa9c. 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/USI4R0800923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c4af17b6e7dab10a5ca96d30ff8239d9f7cb64c136e44c5f1b1c8faaecc2aa. 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/USI4R0800924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c525cd1e000d086e4d8aa33f44dbe5ef21d8f104033991d123c0992407df7d1. 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/USI4R0800927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a295e4574195f7d13689732f5dac7daceb18f86cb2b60aa3f78b1195fe8db5. 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/USI4R0800928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58805d19cbf866ad5797cf2ed04d59a5dadd4b47166d1ef5af1a568649900e. 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/USI4R0800930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01cab50ccb2cc37d3b1635600a4d9b57f72a6ff225e7a3b19a2a4e39d527c22. 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/USI4R0800931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffeb37a6da9b164784daddab5c8066659aac6f3d35cac7ff84d2f211ec04155. 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/USI4R0800933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9be7d49136d54b6382d74dd917e4518a182ef7763ceb3201002ff61b3ceeb19. 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/USI4R0800934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bca5f159e033d22e21e49b4bd550596351e402143be9ea4b13a4fc4865eace. 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/USI4R0800935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3610f8b4f7263473cdaf665e7a1bad94b5aee63f109673bec3641eab351c5cfc. 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/USI4R0800937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22296e201735ff73fec64c1abc4eb0affb3045dd63317f6696644517e0e74b06. 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/USI4R0800940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfba9f851b39fb0013ecd9a9a5bc0fcdef068fd32ff1ac876858ea16caee9e1f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USI4R0800925.
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 0x9ec7f673120718dab4075b1433600a8ce2a993ec7869238039c325a3f992d1a3. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USI4R0800926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0563a92d5c62a41de1024aa01cc9c78146bcc01db56fd60911887faafd3e6053. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USI4R0800929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef729c55b9fd6307f809484a112d62594cc371d10be3d6ae070dc5354878d0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USI4R0800936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177d66a9eb711f54e1ed2746dbeb69456a97dfb9165add05f55f4f3d7f5d609e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USI4R0800938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae598cfe2101b89e780c24723373d0b42ead938a64f0599663dd629e1c4fa137. 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/USI4R0800463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6ed301188b4bfa164ca19bcc320da75daaff97684d3b3add232a3a82a50b30. 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/USI4R0800464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebaf419a6e14202f7e91942d7adcd6636420b01766127d47ba97e9b83ab35b4. 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/USI4R0800466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4919ddaba5cea383bd5232638b173846cc8569874f109778e07b61d6118ed0b1. 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/USI4R0800467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f6bedabb9ca71523ed9784cb5ef1b87527aa9345d431b566475946e172b8c. 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/USI4R0800470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f68c0cf2e3536ed0048aa6a31eaa7e942502f557d4dfae24f8ac1a8d0c6cb8b. 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/USI4R0800473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c596006ab998cec105db9ad3d4a396923f28e695f321bb35c25a9a1fc73a2. 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/USI4R0800474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bdb28b6208333d0e57a6e5016ce1044b1dbd5b9836e59bd1a68e473b1ae43f. 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/USI4R0800475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cebac32d95a12950ca513e66524bdfad4fc7c73e7024ffe135ed36cc2cd666. 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/USI4R0800476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921f5f24d35a6e3b1cf3b8b14f59123388ceca1d17199dceb96aa305aff60400. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USI4R0800465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ed84588e7e74fdcd238588e0dc317af48275757186eeb609fd6a29bacfb251. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USI4R0800468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd79d47246fd9fecac1f1eef2f17c70813c4ed93bb2d029eefa22f131812524. 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/USI4R0800469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f11db5c5e886aa1e4a22de7f346d40d38458d8662c431d0f03e80337e834432. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USI4R0800471.