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 0x747344bd5d2436fad32be84334fe5bddaac9cbeb6d4dfffca6332fa55af3437e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a1a44f8-07d6-4ea3-8af2-c983fbbd155b.json and https://artists.proofprofile.net/proofs/artist/4a1a44f8-07d6-4ea3-8af2-c983fbbd155b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217c1119293058a41223bcd0fc7d67d26e80a186229bfc73c7fb1cafc7965e7c. 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/BXJWJ1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad2588f3302fce3c4d00c6af772edaf0b0e4819260fd40e0979f4dbfa648a2. 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/BXJWJ1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c281658f30ae393fe8c0d14eb6d2c4b3af018d4fc6a6631245caae37530f0d. 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/BXJWJ1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c46c3d169dec04d5d7dd5e02572cf8e2861bb4f0d74cb9d2e3551866bba737. 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/BRHOA0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbb98e808391e41a32351887110099815af0b4d179fa53fa31e1c985185c6ce. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/BRUHO1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd3d03aeb2841a3164aab7a5a5e02c97b7413b3acfd81f8aa1afc3cf0843926. 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/BRUHO1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16bdfcab976a96429e5a7fae634a431c395945abc9d99ad54719567b940bcf6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRUHO1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b9108e094711272044981c06013d0978db290b0ddb8b84e4ba921fc261d37. 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/BRUHO1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06862089d35166f170e034c42bfef69d4f591ac170b723f9cf1d52afe273e6bc. 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/BRUHO1200010.
Bacurau (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e1cf9433d622f2fc70f3a0ac48d261bbdaa2e0850ba044683af84bbc02b615. 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/BXURC1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adf2c91b4614e6d256d6ce4a97dd867d7ad0888ea510973b96a4f4ba7913bd2. 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/BXURC1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2211c017f31a309554225e884b24d03d0c04ee936c7529aef01e4ea71554ed8a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRRGE7900308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4647ed17829b5e82c34934a8347dd05f11664935bc63a90febc2f5112acd85. 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/BRBBI1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d7d51663b5d67e72532cb7b54d6d1b13adb790e815c377c5fac2926724f6e9. 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/BRBBI1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be7f11c118541412eb1fd453da1ce51bc3c0e8209b030cbacd39684917a75f1. 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/QZHZ62147844.