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 0x53252fa18d95ec716ba9a2129d2d0eac95456cc71461b89058eae6b9c9f1af87. 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/cecbc79a-2e5e-4061-8e60-87807486a451.json and https://artists.proofprofile.net/proofs/artist/cecbc79a-2e5e-4061-8e60-87807486a451.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 0x8084aaca092219fe4867c744e9ef339556834e08f7227982f61fbb29003ad69d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BK0TO2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75521d60b4c918d2a098be33b8de28e4c33aee8a57315ff598fcde71ddadd423. 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/GBRKQ2534148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7a3ae8f41df8385dd1457b4c3fddebd57bdf7f6f075d3e91f4fab1cf9eb89. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZW9M2425662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2387d5249a2ff3b94c15733816015637375cb653e2bd607a1b90b62f026b4e. 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/BCM9B2402080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20b54899f7d021a58fb5300b24e80466edc4303bfc6a86cd04ab3ab6bed4665. 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/QMFME2424721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf6cd36dffe8fe4fa2ff046ae73647bb872dceab48afa29a9752cab4b1eeab. 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/GBLV62407974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc29d217b9037f408c9b0913022981dab6c26c073e45799b8ddc900bca28cb1b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBLV62407975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b5fb2fe46d98835fc226c814e5fe7013f52ecc18ff68eeed7499ed6f7b665e. 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/GB8KE2422210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbccddd618a7bf5f9771ac779eac986c8d12650f60aea047f02684b5f0b8ad2. 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/GB8KE2422211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf329382674ca173f6116fa4651766323d547ade7d84715f482dd7c40f220c490. 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/GB8KE2422213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c974cc79805fbac879bc86bf43ea84697efcb2d38c37e42ecf917ecafbeae5f. 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/QMDA62409247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7262cc544f3fafdf7df2eb3176545d4b661f11f80cfda958b59cbb23fe2c3f4c. 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/BCO3K2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526bf36fa6f6170437fe4b4cdba0373117b727a97f9b2d7bf4811f840b5218b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWV32477998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b05951a5571904a57b42d7db8e63eb85d2e185e4c0a813e7bbb2e333f18b07. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BCM9B2401318.
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Essas Mina Tão Igual Violino ( Passinho do Magrão )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa999ba89f3a217f6ce8e429ca1b2441382beb55124997b53fdba87f61e108c48. 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/BCBP32400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2b13af1aa2a6791fc2b19799a7fe58068e31fd5b1611a14f3fd5dbbcd89406. 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/BCM9B2400379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff709593a0e94a440291b6fc28a8187c5533beac74044cf0af2766c13bddaab1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BC1U32201128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64db2834ad6cc00dafc5c1becd6e5cb58e582c7321500c1725810e68036a5150. 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/QZQ4X2400449.