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 0xf0bb822f26a281181917d6a1fa2a6162ab0848a073aff30cdd46053b33adf98b. 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/549c3855-9db6-4d66-ba49-740cbbecd4f8.json and https://artists.proofprofile.net/proofs/artist/549c3855-9db6-4d66-ba49-740cbbecd4f8.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 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 0x4ef76e47ed469dc95e2d28fe26b86e6e78ef6212cabd9bcb0490b0c774934538. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BREMI6200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7345996d5b491e0e8c5dfc03c69aa9df33152cc1a2a32c6c50a28c7652dce71. 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/BREMI6800337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5389872b0f81bbebc0ef8d4af96dddc7342cb5b44057f34a1778c69c49c0d445. 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/BREMI6800341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f8b45145b914003aae6f7e9d37f8591836657e4f9b56e231b48d13c62a6928. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BREMI6800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc3005f9e1be415f214ac30d743c91d80f2dd52002b276d9408e72e97ceb92b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/BRWMB0100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c381d92d3b9763377d997e7dd269ea38422550bb9df336c897e2cba50c6597. 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/BRWMB0200418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557bd764c2ade43c168267205a6e5f3a0f2130093b30a43739438c398d485fd6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRWMB9803145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec8c0e7f8f874a056c0303ecfc3912ca0ffeb63f58b42185a825f624b138654. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BRWMB0200420.
Série a Mágia - Vol III - O Cavaquinho de Waldir Azevedo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88af8e7aef75627fd06490daf6a35b3978611fd8bf9f24693be6b0440808b19. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BRWMB9805905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448d23a7bc9e397369a4d7e51a9e6ff8682ae30e44638bb4f39742e9f32d7963. 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/BRWMB9805907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c23127cde81457760075156ea58ae0e77a6204e832f11f0f85bd0fa235990f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BRWMB0000247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35764a99b8757a1bab797f5c107a985742d0efe1c757a7b6a98e811b9ffb7f90. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BRWMB0000249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00141865be1ba8a10867873988e0c4b335709204eff3ddb2bec706b24d568c5d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRWMB9805911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ef352deb05b9fcf0219dca9bd44b00eb2a619edb4fad4d35a3c0cb553184e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRWMB9900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d78e630e790290249aaa481e034dfd483c1cda5e59d3a6a43563e0fcaa7036e. 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/BRWMB0100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ffd0438a9285ee6f62517a4e4ca78fcef3ce7d1514ae986e90ee8ce23073a7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:40Z), 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/BRWMB9900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f6937ee4391fbfb87fa8696d28235aa77cfc90958a7cebdf7eb8c3c3d4963. 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/BRWMB9805918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41214b39fb3c8b3685a0ffba0f664e6af83f77fd0e3cebdf8804ca5d78861f6. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/BRWMB9802398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337ba957f8a4caa52264edf1ff94b96e8ead003813c207b4033cf1b61380a377. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/BRWMB9702023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a76aa84cf81112091a3d897eada95a6dc8420daece9daf4fe2ca64bb02bca2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BRWMB9805401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88af8e7aef75627fd06490daf6a35b3978611fd8bf9f24693be6b0440808b19. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BRWMB9805905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448d23a7bc9e397369a4d7e51a9e6ff8682ae30e44638bb4f39742e9f32d7963. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRWMB9805907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c23127cde81457760075156ea58ae0e77a6204e832f11f0f85bd0fa235990f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRWMB0000247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b4f51f571582d974359ee92e8b30dd3a93cc06b657a70e74e8f6e0d304ff6e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRWMB9807111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091ca03f095663f6caa54718c0b91d5a640d4aa4d4480d0347510435afb23591. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USBL10000284.