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 0xfd8212dc1b0fb00d8991a263caa6bbfd3b7b3566b39ce66081652fbb65c2b2b8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af2825be-b476-4669-baba-3dc1cfb7744a.json and https://artists.proofprofile.net/proofs/artist/af2825be-b476-4669-baba-3dc1cfb7744a.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 0xedc4ea45be59e226251e4a944f75825e9788e15de6c8ddf8a25c2925b695aff5. 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/TCABQ1395729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2a4128b03fc2cbab9cb4a258b5ef18c7a297cf11fd15306aab93f1a714d31c. 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/TCABQ1395730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0a5e70b00813f456b5ff5012f17cc51cafa77a7fc5c32d77da2bee2bdf8282. 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/TCABQ1395737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ca4b504378aa52dc5af05a8ef5ae386609d33e25be7be0ebd4bdf3adfd840f. 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/TCABQ1395731.
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 0x1371856ad614f6134a6b9e14eac4277894a8df784866790780ccbffc59387021. 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/USDY41677087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114fdb5fa3fcf29bf9cbdc33ef2e25e2d3dcb522ba7c4c96d11ced3173dbd1e8. 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/USDY41677089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ba1d6de2e33d8cc9f1bc00b9699a40316c1b5a90ddc12bf4997524ee64c5f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY41677090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3cb5efbc1d6b2f817e4f0050632260bc83a172b96cef4758ac251d704d0be4. 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/USDY41677091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21f5f21f371fa404b11b4b0800dacf5f51e6867423ba58d6c397ca8d303ba09. 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/USDY41677093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0ab729ef25c83c91383a1eccf6ea8162bf62da8a06a5497537dcefa971e7f6. 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/USDY41677095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0ab335ca4a7ba71b5333b5e5902f44258552be0f5ad7f6f81510ab9406a65. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USDY41677096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce019acf34a0dc8cc7f90a96c784c09684b01c18ea4d79e3cae628f3c75999c. 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/USDY41677097.
The Vault: The Best of the Jazz Jousters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a6f281395b33dfc91e29f3b87e33006441923999c6b15952363d11bda0b899. 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/USHM21551560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e2d1621714ed1f814b8482fc57cb6d66a483d06090743b612ed6600b7ac56. 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/USHM21551561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c1efe55832b6baffd6631e93bf9fba94d4d1980dfef1a0d38ba08460ca3ce5. 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/USHM21551562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecfa3fbe2ebab353f6a597777f498014c999d27f68dc66230faff97b945303d. 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/USHM21551563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3220a450459c9764756fa46aa102fbfe57075863668d5065eb723fbd8258ab1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM21551569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b5b211a8f8583bfeaecfe770f3552a4e10f844f92795bfdf453d8f2e09d15a. 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/USHM21551571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece5e87541557ae2b0597efe4091d4ec67cc5b83b8930d216f9781de818cdadb. 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/USHM21551575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bca67c69b104e13044cb8465dea7d1d579125a729e5f94e6806ac31b4e746b. 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/CH6542086346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5171306ec71c7a88249572259d61e84a530130a31b6f9527084f862bfccdbaab. 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/CH6542086347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a2c00a111a7d3287b7af8f760e9265608bd2539afad7352a162d6ae0d7a12b. 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/CH6542086349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2145f2b6a302b1ad4c4ceca6eaa5b917e451a27855b12d3b7c795be9d762ff16. 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/CH6542086351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0c351bf64fbca8286799b2b7980dc4cb8f5c9d0331bde08dc3738c94083a60. 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/CH6542086352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e4f8093d96f24caf2e48a7178845f2ae5fb39791ddd0dd687a21665b30463. 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/CH6542086357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02bf30c5a90d0556c4ece2e779016085d1e230c32e6345404d12beaaad6698b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542086359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9f7b528c2b7a122862f264f31f0317a22800b73769b0415c10fb6eac82d787. 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/CH6542086361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14667052f0e70f6d8fced7e56453a9a46a4f1c46868537eaff5cbca2ef7b333. 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/CH6542086365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf741194fa5cf5f7157a853e0f2102e6b81cff11821a48aa27a2ead080de51d40. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6542086354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ab1ec791cbebab7c7f329fc0a7824c7cd82d904edac19e72efb10f0d1ff34c. 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/USHM21426675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e9abb85e396bf775e486e1a5d06a4cf4103d9843fc8421516f6c1f168bdc62. 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/USHM21426680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ba3a0b16b18369d33aab3a892c6b121dd42e37c37e00d831339c69c89e632b. 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/USHM21426682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3970b6aabf00077d657b07ea08ba8cd18cc93d7487fbbe20c7002a8636aad54c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDY41523397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066822af26298d290ece45361e6ef1258ec856b280f05166a114413acf741ab2. 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/USDY41523403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8608823c92e148cb88037d87722b0e444886196a9e98e5e366a9b146f7efcace. 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/USCGJ1691482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac93c67eb871b74fe2201f0e8461dacda4300452ddec0a9998c4b11215531e89. 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/USHM91604997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677ef6f086558a20989a71423bbc6a5b1c28c05e29edd51c3ea3f7c7508c07b7. 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/USHM91605001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1000527a29fb4d3562a3182105ba71b3346b81424b4f587987066bb134e3514d. 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/US3DF2208443.