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 0x2f4c26eebd6178d99d5c5722a8df400101ea2187983ec438513d0691f6b49629. 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/ceaefff8-e73a-4d54-8b39-7c9466590537.json and https://artists.proofprofile.net/proofs/artist/ceaefff8-e73a-4d54-8b39-7c9466590537.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Novo Ceará: O Melhor da Música Cearense Independente
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 0xf3a8863b22b65b1fce95b7665cc8d4add12ecbabf32e739f186e8f19b0c39668. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXAZP1800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bd8b47b161d8c26d2c863db80a3581f7c8079bfe793b4a60d4ba49bc9bf330. 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/FR2X42272646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf13250bcdb4ebb4fe742523f14ada1faac215e9028f21641133bbb0a7ba6da4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRTRB2076797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcae89f1e160f3468d553715b0eed44ae173814fed7a50d26794e0e2a9f6257. 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/BRTRB2076798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4eed0215f11fd58a3cdb973025b54a327c6a2fa63f5418a78f4fd2b8cdeeb2. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BRTRB2076799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00acadc55cea7283b83aa7e3b078a65bb8a61cd9bcec117b38a54ed848207db4. 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/BXZGC1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf29cbfda44cad1fdb7d0c6216fb6f40e37e839fc46ce5a150073fb5654c0251. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BXZGC1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96151883c3dd244ad831036020a3a2451897fdbddf4baf4a5df4e5dc14e1b2e4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BRRYG2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aec2ea2bc848ca5fb6bf42f82328302c60e0baa2106bd6ebf3c325e8810daea. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRRYG2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc08d56aa308fef7ce9fcdf3a9a72642d8b6957f2d3cf725dac57075426cf3c3. 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/BRRYG2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c31fd82a2d310b4621a3ae5276e13e8546e1a767b5a61d6673d5026f28634d. 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/BRRYG2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f2a49012b701be4fce6fa91b7984568c27da5f8149747961964644100206f7. 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/BRRYG2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba70b396dd707f18d8696c718586392bdbd9ea9b4d5db579445b9d80244addc. 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/BRRYG2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e2d95c7ef202bc07e2b3ef82c662472e50f561611c51b9150131e3c2073c03. 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/BRRYG2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaa36913cde4f81637912ba353366c7ee0e0d7940ad39ca1415ca9ac900c325. 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/BRRYG2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a95198a9597c4e8f8db83257b805c95cfaca488e294bd26698e1759babe03f5. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BRTRB2077499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267aeebb592f84855945f0fd9584f603ac8f3d4d1ab5d5f2d13e15acd26e11ed. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BX3N62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e3433277baafd9ee72ca97f35c1ef67e3cb154efa245f4854ae612b74c309e. 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/BX3N62100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50baee8c9798475c2bbb6bb1510332bda70dc1deeda6cf75fa8540dfc399dab. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BX3N62100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17f14938ab7cb1f76deac62e0f2c8a4157508ef05de1e831638207c5a3b45ba. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BX3N62100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44759d1e277bfc3c510b6b5a66f70a4ee25cadd3278fcebfdcdb1d7af509ecab. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BCN412500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf916123ce9a3a9156332c3202842dc49c41b3b55affa0ffbb691f4c6417cf0ef. 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/BXU6U2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6defdc6d6106bc160c106a8cadd1c232b81f12017ecda28f15e16cd7d0aacaf. 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/BCJXI2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9908936a87e3b05debbb4151e090304632b704801a578fa275eafff156879485. 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/BRAM81800005.