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 0x6bf124a9289ad12f4ffd69a93d2873ef0a06a85fde4f644d3d5283cd8814c344. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e428cb1-ccb4-48ff-a26f-193f00635e01.json and https://artists.proofprofile.net/proofs/artist/8e428cb1-ccb4-48ff-a26f-193f00635e01.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 0x433542adab4ac4375cd862156287cca91a274b4b3daca92321a414a5b36dc8fd. 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/FIBRA1300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f39656f3fa3bd6d94402f467d82121171bcd04337f191b2ea5640a5497218. 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/USA561019398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e431129308354ea642a4248d89994a2d41bfe8297956d41163a61466f1b4781. 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/USA561019402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b0773c56ff64cb9984e80bd02b4a6aac1ec928493974c14e85ba0892eb33e5. 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/USA370685456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849aa4e7961bcf62ae94490fc977c317ba1e9b7775d9e3d9fc0148f830bfce18. 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/USA370685457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a58cf064dbb24f5d25d06319c3f258836b83f4f7b8c67eb24d91b58522a880. 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/USA370685458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28454bfbf3fe83e0083456c6c56ee5189c9ec145f350aa7f0e3b903a435137. 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/USA370685459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d17e0a228bcf9433a7fc12021f731c5b07aecdc0f88332e295fbd19047ccd5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA370685460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8b6d501b194f20e021c2d46d0968baccbb1fb6d062b41f3543a3a961c4f007. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA370685461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399d2d76fdc537e2c18fff87fe3acd93ce742b3ad4eb28984b6ee786be03df03. 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/USA370685462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f414f45a87579a8505b9aef13ee052328c95fc3fe1f23c9e2b7fd64362046b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USA370685463.
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 0xbf100fb8c165292307ac1315bb49795787da94db0db495cf4b384f7d1cc4a172. 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/SESQC0407030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ed8e50aa3a0a88a6bada94be1176cdc49049cbc7e1210dad81538a2a3d8975. 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/SESQC0407033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e5a7cde39fc06bcb0e644e04ebfee9bfb9ee5947da2baba9c79cbdf7d577c2. 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/SESQC0407034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a809aa153ba5fc5e31f695b1b2eb5456f6ab50908cecaaed63789b5364a9c3. 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/SESQC0407035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821964cc4b1323cae3df33383a36929146c5b4317dc0b2a923bbe92210cec641. 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/SESQC0407041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fb74e17dc0d2021482a6deb05a639551e39160ea15ad94f2bef5c3c43aa0db. 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/SESQC0407043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd955e9a096a7537b90c01d7f37ac53db2e1f6f38c883c98075ab0e54999ade2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SESQC0407044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a06135c4278ae085aa03139ab6b6a30363f9fc3a3ecaf478a4d827bf99ea982. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SESQC0407040.
50th Anniversary Live at the Toronto Jazz Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06a2ec6ed70ef06d901572b737190ae322cab562991e50a71eb82f9400eaa97. 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/CAOKE2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0c2d9877b2cd79a87b25f9758bd4f59759d4602db5e12b4ac42d003a595564. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAOKE2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe715d691c48be60a1e8311d07d9114cc71d4701f73cfb78df7df60ac1f52d31c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/CAOKE2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3643401aa95d003fe70353e02f2194f0ce1692b65aaaaee97d48487ff8d341fc. 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/GBBHN0100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e4610b552e6695ec588bcc99e8bcadec4ba7333b7498879a42bc710e947a7. 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/USA561030970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41171215c357d1bfdfc10ed60a8fb9b09b92849613a6f17c330fe2d629961c4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA561030945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab12bc9d8e5382605db8527b6cc3c263e690e7199c943be902d6684274f18c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA561030946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae977bb498425ada55a126285125a0e826188d8955709fa2480b1745ca9e3e0b. 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/SEVGT0804505.