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 0x0e61f2304bedea642ec40bb077d34560b61713fc614747898febcd713af3c552. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4699233-9d88-4f1e-853b-6f9c20c21b3a.json and https://artists.proofprofile.net/proofs/artist/f4699233-9d88-4f1e-853b-6f9c20c21b3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Arrival (Original Short Film Soundtrack)
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 0x37f121b400bbe4bfedd1b5a3539e31c15584ea3f6687cba1c8bed2150dd52e01. 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/UKFRA2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3163c657ecca261f8066a94b056618b93c0cc4c7f09e8b3b6a2f77b28cebb1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/UKFRA2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03328c5bc54e229750806d435a7b60e03008997a4a04b62421cb7e3ebea8874. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKFRA2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c92724ca642f00e9b864ae040ef3a87f9e18c34ee780d1f89f79b6fe8db92d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/UKFRA2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc442d5395472cb02cdfb57f10fe2a7d5389f0dc0a3cac6ed73abab848402851c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/UKFRA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167861f979c20d791df4a0a9115f2bde9acbd03d17818152be1007fea3cf1841. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/UKFRA2200005.
The Last Cloudweaver (Original Short Film Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f23ff3e0bbd41386fc69948ab1c6c3407d9108d5ccd1f7a37ce82802ee3dcc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKFRA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89061fdda885a46963fd1dc7143c4626f5b831ab4e4fb65be9282d49379ce42a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKFRA2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479908dd853296a7e4689280a6e277f8b82ad9b26838ed142b7813ade47a3b44. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UKFRA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc831e1f7fdc6f5871f7ea5be689d7f3bd7dfd19e5229300cf983abaaae6537ca. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/UKFRA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ed69a66c7b32ca15470563edbb9f1e3a8438bd344ba4525dfdef99589f69ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKFRA2400005.
The Wedding Veil of the Proud Princess (Original Short Film Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479908dd853296a7e4689280a6e277f8b82ad9b26838ed142b7813ade47a3b44. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKFRA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc831e1f7fdc6f5871f7ea5be689d7f3bd7dfd19e5229300cf983abaaae6537ca. 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/UKFRA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b6d43be81364fba386341ccb549ef2ceeefad8d4c3968d66f71723b42c1fa6. 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/UKFRA2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6b9d04eb2c099f06eedd82d3453d63610058539af9182f5e6b86a79dba151d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/UKFRA2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ed69a66c7b32ca15470563edbb9f1e3a8438bd344ba4525dfdef99589f69ce. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKFRA2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a704780047315c7d7ebea117207720c665fa0b5e4643bbb4aada5507d3399e. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/UKFRA2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1b64f54a193c816d6e4712488ba6728a71f3316ab03bcff4548bd2695c08df. 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/UKFRA2500003.
The Entertainer (Original Motion Picture Score)