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 0xaccbcc7e984252b1cf8013847e0f7d8de8d55e4e841eff5d5f65d8cecfa2ef08. 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/ca7e07f5-5d6c-4df2-95af-aa08261391c8.json and https://artists.proofprofile.net/proofs/artist/ca7e07f5-5d6c-4df2-95af-aa08261391c8.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 0xb6c3e12981594abc988e2fae9e0372c9ed9eb31768f402c491be301e1b3106bf. 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/NL8NY2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09cfd8197c60731cba511afe9ffbc7a10259fe6ef909cd5045d4afcbef5a9ec. 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/NLT2H2300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc105f9f6ecff5fffb602cf5ed054dd20b67680789b847a66f898b6c6d0ed79e2. 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/GX8LE2357032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39dd8a948acc625ac69b1e9ff632dd76cb51cc0ddeb84b79e2a1e962ffd7a3c. 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/NLQ8D2200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c728bd2afc59e44f70d5deee9aff8e6066ec6e6e529915d79da6301e40ab90. 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/BEIW12100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec443382e6e5a8c6dc3dd3b48b53b772257838c9a75f8f7982c1f454e6987d4f. 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/BEIW11900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370fc0db2a4bfdc167ca0cd49d26dfadf1b9c0cfeff90dae73807fcf1d01e5a9. 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/NLQ8D2200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bef3ae32ee4dffe857e08cf8e64a5a8c22ced3af405dc046ea92b805383938. 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/DEN061800816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507d675e455104024fd7fceb921721f3f0bea46a0b9edaa3958187970202f5e4. 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/NLQ8D2200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e16a63d13801c1108815e1af9ee22853b349f4ef54e6be5466b75e0fc211ec. 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/BEIW11900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a415ac648c0f2ee8dfe0d5853694e893bb20b280367a870c597116b79a7a30. 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/GXBNP2428780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaea4eaa535c3958cbc4e164f2c3aeb2c3ca868c85fb580c2906aa2176d79956. 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/USA2P2510364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16a97bb32e5b56075b41b9e933822efd6d2da31320e79d0d8773517dffbdee2. 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/NLQ8D2400990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9fe48fae7595c89dbdfb68fd3b0cc98dc0ce3d9af6fee8bcd44dec12d0a47b. 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/DEL712410259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fc77bdc78580b2aec840950236bcaa1a16e2e4f90ad5e3f49785c0fbf575ce. 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/NLT2H2400993.
Sunnery James & Ryan Marciano Present: The Tribe Vol. Six
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d749dca13c0829af1d255e27ef812a16b3e833e208cf259d88c444fb8a11c57. 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/GBKQU2238309.
One Last Dance (Tritonia 377) - Sound Quelle Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a6fb4e24f4c1597ffa4780be907e3e1691ed9b96541e71653ea6ea2e32b5af. 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/GBKQU2238312.
Do It Till Your Face Hurts (Hardwell Edit) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52399f7e758c7cdb48410e76c89aa669e602f1d4318fc1de3709a76026514de4. 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/NLQ8D2200886.