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 0xc0ff6350df6f78ed7fb1100c0dadf4513d35c1b24d449e805097ab373ad819c2. 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/73a4fc33-7810-4dc7-920c-f2ca78dbd85f.json and https://artists.proofprofile.net/proofs/artist/73a4fc33-7810-4dc7-920c-f2ca78dbd85f.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 0xf130f65c8eb6ecc9d97e25f1fae7165c4df288a6abf4533d2d3681a19c8c48b5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAET2038895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69418779c2070ff1e7e7e96f7804042f10cb1f1f9a40a72c194400f08d21f8f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAET2038898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb87ac76abca47c80961e3ae4a114a9081c046811f87d27dd11a1fe5e9637343. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAET2038949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba250ed874856a5227926317218a9c1d756c7aef6dd29f7cd13e514823d71cc. 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/TCAET2038960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d8f47023245017434e10a443232b147cc96ded2455bc7f62b22f1c3e18e77a. 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/TCAET2038967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c71554444889233d4f71e1d24a777fed5cacf65cf8179ea90022e401402d02a. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/TCAET2038972.
Something Inside so Strong - (Live in St. Pauli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9291c7c7b994d922e5f87186cc30e2de9be017d75073bc3a2b522e3fefb2d4b. 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/TCAET2038729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9026607f3502c18ed4bbc53789862cd7826924d7c23dcfa44b7bbb7eee86526. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAET2038735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd89df3095d5dcca1931fa419ae8fd1266c12b57d4b0cec0f52afb88d0a88a4c. 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/TCAET2038743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d681488b5c38a5ef37d3c7fd93cf6c474a9f925191025bb0edd4d43bb20f7e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAES2029278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ea73fdf0a2a17efd5aa26c2c902e3360de1085809f0ccba443a2865e95b5b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAES2029281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0f44d2819e92b599c332e42bde3ba516d63fc5843d5ab1fafca6a952b8bdcf. 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/TCAES2029285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2ea2124975d4e1bda944b67d5c26148ba8a488f5ab453bcd80b8dff889b848. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAES2029327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ea5022b3a3955373b5ddf46ad7ba26346054322dd9d464a3d54717ff982a3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAES2029364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd8cb5ff145f90c0c8cc8959130fc144532b2a1e6f3c5f65644adc379a48921. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAES2029369.
The Rebel Collective Podcast Recordings, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811b57985cfda49bc68e75c29f6b443241ccbd2bdb3bb4719e4a859811149ec1. 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/TCAEU2039189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99caed5b80de86105b06769c52f9f32bf7db15897a284d966a8d9b928fa6e466. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAFE2058341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f7c7e36febae7aa845ec44f175aa757dd03476d3013d33f99210aa324c0c32. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAFF2006700.
Something Inside so Strong – Live at McCormick's