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 0xadf7cc539309652ed9b98ba76a1fc654c98a2687f97271d9b0b9a1f0f11dcebb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69eab627-15fa-4279-bc59-baf501f8dd19.json and https://artists.proofprofile.net/proofs/artist/69eab627-15fa-4279-bc59-baf501f8dd19.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 0x5d13b65b47fe639c1a9149647fcb67aec8be98a96288e42367df13fbb845ad56. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BR8PS1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38ea21d33b3632aa45d856c16ee6de8e19e4872d88507b551c5c2774875b152. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRHW61900003.
Fita Embolada do Engenho, Vol. 1: Na Boca do Povo
Fita Embolada do Engenho, Rapadura na Boca do Povo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793afd77a5386f983f8aedd58fec43a622cb861a797ef8186215d22a51477ef6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/BRHW61800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24be8d3c07e03a6ae17891c74a38e90f09c8ba4700e1b85184f5348f010b7c48. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/BRHW61800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe0c0333c3c235351834b2bacb621b037b1b664fe55ef18d8924df51886d045. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRHW61800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cc6eff55ee9eb2f70855ac2bcc2aaff07b8cba3350c74c1f76ae7af7b5687c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:36Z), 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/BRHW61800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d80006e3d4df802cf88e6ecab13e11ac5c2a805597b2364a8a741eaf57bb39. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BRHW61800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213afef6722e57a02bb6375535f2c569e22af96a33d3f94a253fa6b33003fb03. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BXW812000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c22592fad8cbe4f008277084f790d104fad1a1d378d5cea3a3a8c57400cb164. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRHW61900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2261e4c1b56403eb0ee99d84b9368a85165c9d12d65a385837ecbe5e57060c1f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRHW61800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49141915b06d7a0d1f71cf83669b46a4ff68ed5529f63f670c418f4a07d3bc9a. 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/BRHW61900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530129d2e353aec039c5e5f45de39323cd5f35540637bc54270e2d90b0107b8b. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BRHW61900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5cff99f868246f58234550c493cfa0bf7e492821cb92280b7ac8064f41fe21. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:40Z), 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/BRHW61900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb35eee2955c75668c9a491e592a069e6026532b0dea423e4cabd36bfbd7f414. 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/BRHW61800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8160e3ebbd764a1ed0499d08637aa4c8543418332b8fc34d98b282058bf1af. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BRHW61900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996d1947222f9f9d582e6cde91fbf26c6b8a1a17d250fc0d131b23514dc93f1a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXBB12000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262ba695a1d414f0e172f12feeadcedad5353503d71c002b53916cf7ec2ad5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXQQ32100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262ba695a1d414f0e172f12feeadcedad5353503d71c002b53916cf7ec2ad5f. 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/BXQQ32100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb51c61d105db5f815409b7eed03ed09cf9cfc8bc09368766bfb8420596791. 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/BRT0O1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccb9cf11696d4933b9b06ceacc64910589b810fe4753f9a37f6468aa1872cc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BRCQE2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157661d6a108c67ad237872f9fc7d3ff5a06578f443a4c42f6dfe3ef7d72aed4. 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/BRCQE1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf81c2004c829dfd0b9a98a75788cd6f16c71a0f874fe4408a9642b1474334f0. 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/BRG981000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928ea622e9895fe71de244c2901cffea25fd1527e4062655b57c42f9c5b76a83. 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/BRRGE1905356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee44ae6133dec179537a9607d8c31f7ad3c12bf18aed7afc470c7c574023090. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXA6P1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c268b7b7e721191291c14abdb8327e897553238c051ac3b161ecc482cc26c. 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/ES71G2425590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe45c29709af61badb95509ce05f4527014483e795bd6dd9a69dfec04e9342f0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:08Z), 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/QZTVM2316651.
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 0xe327dee7329e34570913480a619f3f9703afabf24215fb2ae7254f4c7caa3f12. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BRCQE1000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21f99dde647900cfaa4c64d6b5ffc6b64285264a1a9b49172446f630e9dff32. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRVTJ1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9458d233f64fa1a6f5e10c16979d6b50a34db37c3776b820c1993bd66845af. 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/BROSX2300002.