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 0x0e436a2a82d510daf12d6c8e4547ce8dcc744f2e983404fb44f1b20b67aaf992. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0470062-2efa-474d-8d74-6838d2fd5a95.json and https://artists.proofprofile.net/proofs/artist/e0470062-2efa-474d-8d74-6838d2fd5a95.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 0xfb3f417f98fc7bdc7a7bb18c5aafd3d4f1056f63f8db4982ea5c55ad2ce641e8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/KRMIM2461484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cba1d44b427408e36b4792eb2e8d56966e2903cfe07eb4b2a3aed40fdb3e548. 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/QZF452004849.
B on my mind (Feat. Leellamarz, HunnyHunna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c438e56439207707da5a2abe75569c7722d6c05cb4d9fcb2c64be42dc39df3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZF452004850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff7c38e26a89f5310d79dcc929c58343aa530bfac98336bbae936b6f1ba8c9b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/KRA381701138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ee6370d6de5cf9463e746935a8a4c6de3ac1f64465dcaf70604645ccafe46c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KRA381701143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cace3806b5e2642c2bb5be290d6946ed3909dbcdc51e3547056fcdb5e900a5d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/KRMIM2523528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6378172ddf1160d0b5fafe5aa4257594fe85a1584242c0c95c75f041c7a6a9. 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/KRMIM2505383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136cdb6823c5804f127bb612c8d6453bc52be7e90bcdc0727ae793e1c2cd122a. 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/QZEKE2026241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53af4a4887195fc7857eba3854339290552da5bce1f86b1bd19136067113f95. 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/KRMIM1922805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b2cd1187021d7472bbc0947499621bf305a86cf8e4715c1fb120f3ad4e778e. 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/KSA012162985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6281dd63fe98fa8e2d053156944c9404b66c0e5505831dfb64a73f7aa80e806. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/KRG032501756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b86dfe48ccd667ebfebcba3d8f56d843a61eadcbfc3d26b32005cc6fc7aa1bf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/KSA012357375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a86ece536ae96fa28e1416c6235bfbf02aefa40470658b97168bcd3a70f55fa. 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/KRNAR1803460.