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 0xd1528293267cdb019cdabd8f2778b647d2c2969f134472559ae4712c1ceffe15. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e48b3eb4-d643-4616-a012-3ee44df11f5f.json and https://artists.proofprofile.net/proofs/artist/e48b3eb4-d643-4616-a012-3ee44df11f5f.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 0x6c107f0ea66e2396e8aefd6f2e7024a0037f42e228fd9bd4727cd8bde17fa7dc. 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/DGA072279621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3215aa19a768be05b9203e2c43396141a806107d6250a48ae87e10dbf50e3b. 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/DGA072279622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d09a458b6ca9747e9b09b19b2c20fab74ce3aed888200d1707c4e8577d8b09. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA072279623.
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 0x92c4fd6112e959ff4075b1c1e68dcb82675075374a2a60d502972b747feb3e0f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DGA072279624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbc9bbcb75016072bd42c568bc5ac26a2a8a8c551167ba8dd8c205d5b828f38. 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/DGA072279625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f48a9c625901e81f3c0711a2b77316d9815f9f85259e38ce6b2b8633885c73. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DGA072279626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac1cfba4d6cd92440f3b09b62ce0b6223499c061bbda84a6c396130ccff663a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731612525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9ba9d9ac2ffca08aea6b558613515731f9146a93296dde0ffb5914d3c63f07. 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/HKG731612526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c296094dc45bbad2b7bf3200a67142f7c1248773cae5efbc50057d80d8fe60. 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/HKG731612527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13ded26986f29ef20c801fff4f90922a9e6606892c51f45ca0e88c329b8e164. 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/HKG731612528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56247c3bc2ebb4d93a933eb7650ae1052693a7cf324e432d32c36edac3d0f56d. 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/HKG731612531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d2bf843bdcc90d62b72ac5d177a5a3aa9674cec76bf6c1bce0e1b0c0794cc4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/HKG731612532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5f1f51874096268e4c69568157abd7669375d16a479ba763efacb74a482840. 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/HKG731612533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed01e126345996db842e236577db88178b61c657b135ab904a5cd36904685afd. 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/HKG731612537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d62be06ed955f3b7220b048f8b9f9f396a84160de600ee0ec3e01575c1b7ce4. 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/HKG731612547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d80ef5f21dc9067f3513fde581650149deefb36edcdc4b9c58d311d4640d46. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKG731612538.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841357cf5bf7d860e1091ddfa60ef95646f89591c607bac27579704642c68d88. 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/DGA0L2310052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7246d12603d7b290436b6bc9a486b906a0bf00fdd88b4d04fd657e0078161aa. 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/DGA0L2310053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f57fb22591389001ac9b580221409645e87498155811887420637096877b4f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG732242055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a24a2f4643354c002c2397be08fdd05b882cb09fbedbb04f3ab4b7b9fd504e7. 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/HKG732016992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6351af80ea35673f68f166de4044467af0b28533f34274d603667ef332f3eda. 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/HKG732016993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f970f6610385cdfe53d4ffe60d00865a58e9934077bfc56b0193c834590cb8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG732016994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76da1fe34fcaf58ed5667b1d308dcdce57d756edefc52b34cde9c7229186cc8c. 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/HKG732279806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12552c2fa8e7941c0845653ee30cf20652851945f838a8207e90c8718f69f15d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG732279809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecf210a8ef55723808c030475e12b1d44a03e044f5b23e8d78bea54c06568e0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKG732279810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35c61c5355e699ace16129209fbad1ecc39df638d9bb5548eb0387001d49b4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKG732279808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e7bc1cca9d6fd88996e75cbdb0419120d2ad1a5265e074d0cade1e54189de1. 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/HKG732279798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc14f9ca1c13402a8f3f0af1eb2bbb38641b5c286d408d71dc180ef750e4ab00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732279799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311bc94b105644b01b28b0e94ed1a97ab9de628dcd90f985551f6896010cddd5. 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/HKG732279804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e0566e0de0f9bc6d00d69c6ec9b7ccaee4f4bfbfd681749e8ab0ca70d268ad. 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/HKG732279800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c96109adcdea99ebab3f0e705e73da3a2caf00f04d8360a8fbf74a7f72ce59. 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/HKG731569338.