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 0x0ae571177f5603ebb0579a6cdf2e7ead71ebbd9532b85b845b93e741117acc91. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bea51d1-33a6-4330-99d4-668008e50a3d.json and https://artists.proofprofile.net/proofs/artist/8bea51d1-33a6-4330-99d4-668008e50a3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reading – Study – Focus (Guitar Music – Acoustic Guitar – Afternoon Acoustic – Music for Study – Study Music – Relaxing – Relaxation – Music for Concentration)
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 0x475973108dbf8d2a9136817b603689cb6cd876016a6f3b59655b6c1d2064ce61. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITS782200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0d5351e4eb5eb93ff76449c2e13968d2debb1f11fb231eadfb36be70ca43f3. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/ITS782300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38de21fc7746a3aa9fb7f97bf4807433a2cd287912275941543e7b2e13f9f06. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ITS782300729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a0012b317008c913bab4cda6f9bccf10be5e2ea5534dc678963742f09a3eb3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ITS782400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f4f8bc7de7b20833a7bde0c0c11684a3af60a29a8d695bb9e2e47fc51619b2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITS782400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b30d7f683e5afd855e7848180e354dcf56c6c4526de530fa8f82c8bcc4c9a7c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITS782400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261a327bc2c17de439f21b40d7329c8dccb406b480b15c27f3f8a9b5e0bb7aae. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ITS782402246.
Healing Music for Relaxation - Acoustic Guitar
Relaxing Soft Guitar (peaceful guitar, afternoon relaxation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d046b8b2185762814cbfc3e6d192b6d7c4e64ae0432e2a4b136f3a237dd7852. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITS781701240.