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 0x4d81a799c3b018dd81cd7f72e48f89fa1add247f37e9e1a551ff15c739d60f88. 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/429f77eb-a246-4b1c-b9af-a1b3a2c029ea.json and https://artists.proofprofile.net/proofs/artist/429f77eb-a246-4b1c-b9af-a1b3a2c029ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3fb673c73cb197811560020e553f27552711ca419e65ab9af8303fae511a791e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GBKPL1418552.
Filipe Sambado & Os Acompanhantes de Luxo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76047e63d0b9d1adaaa1a1499393723d87114b0f91588a09db2fb661e7dc816. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PTNS11800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb82f0822884dc125a202ab8a4140038fdf0e0eaf0d46da76de9a541959cb18e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PTNS11900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf22b82d46a9796a7924097f90a88cfa2092ae0c2d1276c6bf0b006f8ec989ae. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PTNS11900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53b08286ac00604b89f546534d8affc1483a6aae76f407899bc3f0c8775d48e. 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/ES71G2319199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9195fe475e7bc825fcf691bcaa2203721916543d9d074cb9a85cacaa767f8f7e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G2316660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e160175d0dd981fcfe38486ed395f2410403c18969d4b601686bc3675bff02. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES71G2316664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a250d51bcd0c1a2572cee32dee9ebf8db8d8a266f7b598ff6ac8df607775897. 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/ES71G2501681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34aaeaec6bb7bf91833de398467267a2c1169f990e23d8f07172e5eab044101. 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/ES71G2501682.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a1676be80ca054cfaa1599846f10ab8823df122acac96879a7b603a8b5b713. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/PT3G42500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2619a7ef2e7fbbf03447786ce407d45a73f475ee61a1efd52b365a90719c208. 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/PT3G42500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa6f0309ba4b0886f3cd8b20bf19ba81278db747e6da9653a830a3b922080f4. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:23:27Z), 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/PT3G42500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a361071f27bb78060f4cd7a6aef888c0235fe3ee0e9efcc558e873a572bca2. 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/PT3G42500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2186f7e5ac4e1c321c31fb67439e09f4977415c84301530c9dc139883e995ee1. 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/PT3G42500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44448668103b02e096471f1699808ad95f2bb06677ea0ca9719a84002d940ad3. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/PT3G42500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdd8d50937cacbb5a0ec83a20851d9bb15344b4d995f2e5503a1f3d7c8315c6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PT3G42500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16b9aa9c05ed34d47cb16196204a615873d80ab2e61c77c79dcc02d9ccd1873. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:54:35Z), 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/PT3G42500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf4290bc170f933d131bcdb517e1fa348d3a157f1f1affd6414c6210319f8dd. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/PT3G42500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c41d281b0180e5d477f07fedbe8135821f67d8ddf0907ca5fab788bfb7c993. 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/PT3G42500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beff3a1651af92cab97008027bc320dc63f3e9a95c9ed7dfea980bdb69b0f1f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PT3G42500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3489cdfb4fdb9e108b75f506c61f58d977feea1e601f13c837ee411618d68c58. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:31:26Z), 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/PT3G42500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbcd8a6dcb8c97716411c62fef1145a16c2b4b8a6b2fd36c887b645d4325c92. 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/PT3G42500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ff2a14b1e6c50e1f2541be4ff30b106e12ea99df39fb5d35d94da75ce8a00. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/PT3G42500014.