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 0x8c2feec38622a290f8808609fad2b65e90d1b384455084f1e89de568ce98a91c. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b945c1c1-a34b-49c8-ba84-1ddbb7e1c8fb.json and https://artists.proofprofile.net/proofs/artist/b945c1c1-a34b-49c8-ba84-1ddbb7e1c8fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alatriste (Original Motion Picture 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 0x1674dfd03293d7ae5b9ebd2d165dea2bfd0b1a649343fe89b27b48aefdbce1f1. 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/ESAAI0250567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7bd5cebb75eab8f051595c923c5caed9cbd59928d44b72e730dbb25abf9815. 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/ESAAI0250568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137778983c4fe3044633e564742add5d4530f8a8af862c7284008221d1dfcaed. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ESAAI0250569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619ca5dba93f9ae8e9afac82541d712150dd42463b6f8c4655e13b5103cd6f77. 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/ESAAI0250571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce301159963cbb4d0670d8189ab3e259564d43ea9c9117f062720dcce18a5a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ESAAI0250572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9160a51fc14953ca4001a39ee2c7c2327aa3fb374181ad4adc7db96b1746ee01. 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/ESAAI0250573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd654da3d80fa1889d024724f0a3bed092497ab5ee039dda2cf9b5bbba7c14e65. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ESAAI0250574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b347195a9b900fd45c9437f6d706662e05e16c605eebd440e1707f11a0329. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ESAAI0250575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07045a6cef8fd0bcf55932ee9629d73979cf361b298e5d399f609ebd2b02008. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ESAAI0250576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe923d72964c9097317837b25a515b4cdc469644f9bd8f51e793a239e53e8750c. 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/ESAAI0250577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76af5052dd3e7526a1eb29ef84500d1db1fade88b202f9ada9044e11d79a8314. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ESAAI0250578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4e0e1e20ab9b8a674132fa0b534e644efd60482e76e90215e4d5402e8bb41b. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ESAAI0250579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88e10d334501d15f1dc0533376a5ee30cb9d24d000f1fa3da8ec9d9956a28a9. 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/ESAAI0250580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6237d5fb972ee3dbab20389a547bb6da3452e04e6da773887918eff8492e130. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ESAAI0250581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db6999fc60f4945b669d60ae97bb1f9079f880095c57e54901d3b2b70ba0d28. 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/ESAAI0250582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536b301449602761be31b8fcc709b871bf29485f499617a15ff9cd6540bc0a31. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/ESAAI0250583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac87e7c85fbda3b521223e83047bd6b6ea9cd63668642c375aebfe8662b171. 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/ESAAI0250584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ff10c74f930e85a84a4d8b3b2ce6f4afdc31107f17c3e872624ee0d65fdc53. 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/ESAAI0250585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77224d841abe475dde2fa73e255f90ea7031441e3767206dc90be74089c9f024. 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/ESAAI0250586.