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 0x498796d443cd01153a7d22a2785d723c70d6f44af82a0dad3521b413a0b4982f. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2b07b96-7940-4b7b-baba-df459776cdeb.json and https://artists.proofprofile.net/proofs/artist/b2b07b96-7940-4b7b-baba-df459776cdeb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Winter Evening: Piano Songs for Relaxation
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 0x6ce9dedfb9193ccfcde253710d1cfa9318be7ce329b00ff046af757381188761. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZP7F2568990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9316dade88b941ccdc0fecc4f661afce1bb98493137d73de37900ec0d111bdac. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZP7F2568991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef06a7df28304243ea700f36a55a028462adc43130cf7fe6c7f246e92b3df088. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZP7F2568992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85586e87263ee01c4591052f74da1948337a42bcfeda6c4988debdf601e4ac29. 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/QZP7F2568993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11e117be34ab4ac532b51c9641846b5efaac14eee5ae8340aacaa83aedad5b4. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZP7F2568997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa884b2989c7e4774174070055e57ba39b8a7318e47b5f0afbb9ece22da144392. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZP7F2568998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6fed6c3e92bb9e26c626b54f6710e26d845b16d98c6718f548e9f5cfe9b22d. 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/QZP7F2568999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35957f74d7a0f307461d901ca134c9aca2d57b4057ab9e37ae295918449efa3. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZP7F2579596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2ab8ba0076c0da24a678ac0046c28b8d35afe0695a9d2821ddb210721e2a3c. 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/QZP7F2579597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570dc4474d1c786037e3be10bd7b20076c8d4a8b7e10305a8b48d3b76b08ab49. 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/QZP7F2579598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf535132e24a8fec9b409d267e16fe029aeee5c47c48e741ee333b687b175e499. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZP7F2579599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7804798deb7c1efeac06e24231fb49a862d5135f4263d354661416e1f2e64c8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZP7F2579600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8df786586ef9109fbfbba5cb63f9f6063ae8e0a90d140bb1814fef3d885e3e. 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/QZP7F2579601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aa787f14aa21cad4fc19c41f121e1df01c01b11dcddc36d98aa63d0cd6b238. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZP7F2579602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84487bca72f1be4395ae99afd2a20de5abae8229d7f1e6173e6a04ee977fe00e. 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/QZP7F2579603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ff2cb30bb571a85f297f3083ea63cab8fd53bec05b7f3dee1287c16efaedb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZP7F2579604.
Dreamy Lullabies: Soothing Sleep Music for Babies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f71cbbb26b5344a6e3cea0d6c25da615564406f7dce83597d8fa2e77b96b7c. 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/QZP7F2553826.