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 0xe4338adab0f571404b40e51880351be1b66772fd0ff4c5f33cc6d99d7e9f4834. 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/98805d22-817e-462f-b0eb-7fb3d515ec25.json and https://artists.proofprofile.net/proofs/artist/98805d22-817e-462f-b0eb-7fb3d515ec25.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 0x7cf285b217d9d5e66fd48bc391f7df6adbdb0039d46e75442f32473f0c73bf5b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/FR2X42309736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb538633fe8752e55ecf0b243146bafce9c7bd5b1e9ca39428d021a702ddd0542. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR2X42309741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded3248a517a2624ae14229fc402506a5e91d2f34beaa26aace52c87230705ba. 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/FR2X42309745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea5ec45bc9fa93948a0dd07a9bcc5cce22b37c59dd95c9eb96e26fd2ced049d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR2X42309746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc299c24b4e59309b4cf443544fc874adf8eb758f065e50a840c373f7ce9d3da6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR2X42309719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73507223f5ace19d70ce870d4dcfe698508cec06fc6635848aaa03483df1b1b2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FR2X42309720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfe272a2eb8eb000684e945c7a37c1e11126404f9302eafa9730dbe1d8e57c3. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FR2X42309722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb761e489d73f009480bc8bfb21fdf3917ae562362606aae0835b052d05aaf2cb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR2X42309723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d4961f7454d4845d10012232184714694d93e151961ea36e363929f64947b. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZGLM2490059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce616394153f92b5d35d08dd65f5bd7109c59bfc36fae12472a1527d3912b666. 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/QZGLM2490060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6967da18f1a3d1e833caba0b4eb186770e1f485b569dfeeca3a68869c20fcf0a. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZGLM2490057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae10f66a3e114ad581d4c317e342a5cb6945edf859ae45c94feeff5c93f3735c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZGLM2490058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5288e1fa8b820f37a0b8b5e3a80cce6805edb1568feb4559f523af8119b193. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZGLM2490056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304a27938d75f5ec6dba70b2814eadebafad3925b3f94ad05142ea326e1f1ceb. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/NL8RL2441352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a834199ab666a058dd8dcdeecd528375c30d57d9743494ec0c24996f99ea29. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NL8RL2441353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30ada22b818b0fe5481735d1ba8dfb1beabde06e6b5287a4e09339196242b3d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NL8RL2441357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9073a8343e5fe2f1b2a620eb18ccd035c54aca22e187e16300338111fced26. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL8RL2441360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0538758766ccfb4b32862a2329edcbfb3255b9a25d5b06971cf5294440fb277. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL8RL2441361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9471ffb58ca0c135ea76820b6926c02a8d93eac64fd56221be6f4ce78e3fb2a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/NL8RL2441364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2015ee5f49903d8124bdac8b7aa5c933909208614940f1ab6ced561c0ba811df. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NL8RL2441366.
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