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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f308a6495a46c605418cd79c5ef616a5e1122658e0dd4f183a0fe5a1cb63ec. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce6764c9-cf29-47d1-978e-5f296838e281.json and https://artists.proofprofile.net/proofs/artist/ce6764c9-cf29-47d1-978e-5f296838e281.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Purification of Mind - Guitar Music and Birds Sounds
Soothing Relaxation Acoustic Guitar in Nature
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1a03ce54ed415b5649a451e03adc7a9e8954994398a604e9ede12420e2fa6e. 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/PL52J2195642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f70932f91cc77e0867b521d5e55414fb6e406e9e4c625acceef3b249bfb5414. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL52J2195648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d7430a928602b352b486e6706b59277c76a2709ae05c5e1bcd894dfd7bb046. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL52J2195651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac8df5ebe7ec70a32538f4b92f1172a99d776991db965fc65b4a69a5b0947a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL52J2195640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73534233167230af01837ced9ed9690ba1b4b1a4e9b0759518d18dfe86a49b4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL52J2195645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63fce68647cd2c863ce230feab36e780d463d3acfbe657bf9ef76d7d1f4d840. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL52J2195638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b9620acab853c9ea6f0812e10308a8f5a678ae0a27ef29c91b92e38775cc40. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL52J2195655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab63f4855be5a179b97d8a8136e276f16242f3d2d3b533ca20d4c1267f3b18c7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL52J2195639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149a3ffcb2603d02d0a218c0d1c6154a9370702a1f6d8203763fc6f8637bde20. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/PL52J2195637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffdb0fac791cec4616f67fc08e9cf1f6649ca089e2422e06f05ec6c4bdac73b. 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/PL52J2195643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615fdfcc896d4cc15385803158e4c749f23a263f95da53f7216a937647f3474. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PL52J2195641.
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 0x9fea02a0e73a581d593539ce74ecebd7fe8e0ddde457f3b5b1a3dbb66fac366e. 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/PL52J2195646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167dec0cd2040694946d1e097b563abcd3d6c452fb4af50bb7eca38f3bb0d458. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PL52J2195654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30909c9cdaa0516a1da85b27b41c46a0062b214cbeb437019ad34c83dd289ac3. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/PL52J2195652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b865a27720bd15d34eda147e17858d734076b48651d2fe95aae6cc465b4b37. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PL52J2195653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadae0042df216ae49f08b3347766d2ac7e139ab461786b1172abc589b3a30c11. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PL52J2195647.