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 0xcbd343efb5a38752ff6964b4790e1fe78d36a9f281ac9986f4628205e7612138. 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/0cd187e8-5c12-45e0-a711-c9fa21d016f0.json and https://artists.proofprofile.net/proofs/artist/0cd187e8-5c12-45e0-a711-c9fa21d016f0.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 0x11197665346744b78de73593681c602c9a9d73d24db9187eaeecf8b2c9eb1afb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX872371389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300eff9640e506382b07bb4252a1914a102482483a226ec5d1e6377365de14a9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DGA052334536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4644f8f1a7ced149f96f0bde5371a38dd2db3228ed221656f3c1b81c0088e46. 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/DGA052334537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7773834cf784a568207a734cbe862fb16dadad3502a483ccba34ac6ae08d44. 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/FR9W12409236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2bb6956ee14b6483f276ea23327d72ac9e48fe84ac76c224c6f50002ff0895. 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/FR9W12417809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3850ee51bd1cf4319d6e70096e87694ad4adaf3d4598d46c677ce1867758aff. 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/FR9W12426566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473e039cefeec885887807bfbe8352aab8515a46f41156c834e23e2a207f527f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR9W12428478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6705ffae972ee7e1885190b4a15eff854a3b8a558dcf97890b7ea8486f6f70dd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12428479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79350ed0a63eb08b8b94d639870ec3ffdd854ee2cdb9a4a19bd95c210138d44. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12428480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a6e7e593747715762e721623351332fca785a54187de2e8250d1e511248e27. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR9W12453336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a6e7e593747715762e721623351332fca785a54187de2e8250d1e511248e27. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/FR9W12453336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e00314cf41a7fbcc499083ea3418cc728e4fd0d2ed8d7594e9d434ed99698fc. 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/FR9W12454843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bfaa580897424f18f05c0e26971f41080095aa5bcde503d7b34543fc35de1. 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/FR9W12454845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb8dfd581e057289c518cd582dcccb7d2cbadb078db0b69e5afd8c7ba88e984. 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/FR9W12454842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2bb6956ee14b6483f276ea23327d72ac9e48fe84ac76c224c6f50002ff0895. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FR9W12417809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bfaa580897424f18f05c0e26971f41080095aa5bcde503d7b34543fc35de1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12454845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6705ffae972ee7e1885190b4a15eff854a3b8a558dcf97890b7ea8486f6f70dd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12428479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e749393ddbe87b08b00f5153e3e6323679a5e891d942f94b77d5b0daf1fe27. 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/FR9W12456565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3850ee51bd1cf4319d6e70096e87694ad4adaf3d4598d46c677ce1867758aff. 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/FR9W12426566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e00314cf41a7fbcc499083ea3418cc728e4fd0d2ed8d7594e9d434ed99698fc. 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/FR9W12454843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a38100288b42a28b1f154e5da48b95ad7d9fefd142c64c7d4aaf18a38be7c. 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/FR9W12456428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3a82c45feb9e75d6990375e4a7b5caf6491b2c050d0d35c8949c570789dfbd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12456427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb8dfd581e057289c518cd582dcccb7d2cbadb078db0b69e5afd8c7ba88e984. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12454842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79350ed0a63eb08b8b94d639870ec3ffdd854ee2cdb9a4a19bd95c210138d44. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12428480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362170a3375d404f7bc87f93a91d5f9a388178bb9dded27b9631065483ae2d4c. 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/FR9W12363078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362170a3375d404f7bc87f93a91d5f9a388178bb9dded27b9631065483ae2d4c. 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/FR9W12363078.