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 0x24c52e6fef7e45ff0598ab357d277fb2013e7d9bc1c5a74bf93dffe1cbdd945c. 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/40931fbc-c32b-48ae-8bdc-4b7188590135.json and https://artists.proofprofile.net/proofs/artist/40931fbc-c32b-48ae-8bdc-4b7188590135.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 0x3b4eb69e6e9cd37d749ff49b3268f7f48b5a8764f6de0dd254caba31b62b84ea. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZEQU2044292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf5eaa88009841af92f5dade68dbe627c9858404218fafc60d4a9e04bc3880d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZEQU2044299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5907d15668a21e7d15d3e8841b18ace000348bb059d72719817cdb8e115a740. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZEQU2044373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb23d1b1a2e5d5caa38d5dfc71314604b7bcfe2957a69cefb3ef99038dea876. 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/QZEQU2042857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dff080ab250a28ef949b8ee99f14b546c9eae653e6569d342df52ac94fd2551. 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/BCPOR2000011.
Leva Eu Pra Você (feat. Tarcísio do Acordeon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daaec1125ff66adcdfd81aac1ddb55948a905337cad8804a3385e009112f6ed. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/BCTOE2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a361b811f26ede1057e1c5536cf8bfb0ddfb1635d1fbceae5882aeb1cd4893. 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/BCTOE2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3068972ccbaf37b5960953ebf8283bbd520065cecde89913f68f49811f1b21. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BCTOE2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873f6813ce88e439913a9fe8737d6cab4918bc39f5dbdeef5597a8a36f5e2c56. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/BCTOE2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951a57912cb150f492ecb60cd0f46bdd17a30c0d64acffbd7b24c396cca91bf. 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/BCTOE2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc6785285ac3c9d38403aa24c8617bea471e1495e2c1b28bc4ba0ee76df0b9e. 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/BCTOE2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e037ddbc36b27ba56ca8d57bacb92e2732f48641ce73b8c5ef157c8b7b5e4d4. 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/BCTOE2200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58a5f4617f9a909d71828cd47870c3322e6dfcce6214515c765cf9e61dc0030. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BCSUV2303049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b391739a8c12019a9eeb5da15f10d5dad10fd67e24c25afbe5d1e3ec00fdbc. 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/BCSUV2304092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9962183748a9311a0159df03d2dfff38ff1edf82c8d1842522b99818a2f59e5d. 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/BCSUV2304556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ac9a7c594023e12ee54c6700bd1dc8236ef73b7870f95e5561835b4bcfd6c5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BCSUV2401474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf92f188c84300158e30612c464a49d2c3dbb724b41d9ffec80d3a08ea4ab5d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ILTON2405959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec1648e1684cfff642319ad58c32e97ca2b72b33ea1ed04722ca6391daba1ef. 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/ILTON2503901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e7dadab243ac22ef317bfdd00bafa495381e4d4da673709233d5f5ed4bd4bc. 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/ILTON2503902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9efac27e49e51e9bd39d97060cfe9db4c2d55dfa2e232de87caba798d03f5e. 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/ILTON2503903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fef8386c22c92e00de1db5b86cb46704ad37df4538c3dcdaec9260ebe69015. 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/QZEQU2218695.