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 0xdf85863d4981afe1bacd3cb0611a49dfc965ff8e49342b5245705338b49ab518. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0f99126-1614-4d19-aa2b-808d6ea37f23.json and https://artists.proofprofile.net/proofs/artist/e0f99126-1614-4d19-aa2b-808d6ea37f23.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 0xe152f98f3c2a60e47332c8925f64436ad8c5dc0bb676d2db17778f3e7b699913. 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/ARF030300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2317f6ad172e8cfa38098e8b641867296374877ef89ef897ca49434843def8. 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/ARF030300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef58f4633d28f437dc229020486c1edd0aa6a62caa5ea223c27511949580ff55. 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/ARF030300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544f2867e8a2f4154ff4e787d560a6907124b8e265225f78bdced4fdd0833cb2. 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/ARF030300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a026c21133e01bb2ae5ca0794357c0e98235b6a84066f3dcb9f95bf4907602. 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/ARF030300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ce1c049dd25a76384db698df4979ef26c1f37075a75f371e3e14d74778f6be. 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/ARF030300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143b374a144e239c73d8719126d67c6e4d0697115611e02ae7fc32420d9ce32b. 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/ARF030300199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb61cbc1b9ed241459190bffd722c67985083397a3192190816fdb7af36aac1f. 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/ARF030300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311c66fb9f2dc88538651f6922601e51ddfb094e15774168d2b3b1122a44b997. 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/ARF030300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff37cfe715ffef98b089bd6a0c0cc965953ecd77b74da969b8cc119a2f0aeeb7. 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/ARF030300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790df61be7b50e9fc30e22d60d265bc10fa4b3adbde2d68f1d29b1fae3a8712e. 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/ARF030300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1024f2b8f05584ae2377298db8732ef63da56c61b56ce014c515171088e478c7. 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/ARF030300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc03da305fe1b384dcc5c3090d2a46b50ba38bb9f11ec6a5a8ce71bdd04ed06. 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/ARF030300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bd1ec2d043ca9eebb6207cb674ee7e9cc299ef92cdb59571cdb172fc455e06. 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/ARF030300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec58a0a4937ac6b984bed4353c86dc88a28a52e95368a730d56db76f2600a71. 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/ARF030300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538d5a37fbdd3e76b85c7b62f08aca850d6de1b26a50456024566073ba1b2622. 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/ARF030300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71735783e85e4f51c703090fc556f25e0426d3ff58eac742d92ae87b4641803c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ARF030300195.
Amo Dejarte Asi - Daniel Montenegro Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c81f0539c7b77381d326a7cce2433b53527eb6061d61a80e78b8717b3c104bd. 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/ARF030300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afcd85c259922513d919417c6c36cc45c3ab8a555576cdf6a0f5054befd0ecb. 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/ARF030300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4486abc6ce8c1f7ab985742576f7f6ac9c4f5680000119c2420da543631d4651. 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/ARF030300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6061971b923f4aefdc07527b2baed0343bbfc6e82d0fe579eeff66262951b6ce. 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/ARF470500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db4db51e2cabf6a1ff29faea6ddf3483bdb0b0471925703121214854b51c10c. 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/ARF470500018.
Gratis (X Instituto Mexicano del Sonido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f00e5e84aa1133ba6aa8714fee4cd2c3ca9ad9de46ab30b18a4971d8dbf557. 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/ARF470500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf416a875dfd27a20e23ed64ac57f754dbce7a30ad65bc355a153ed497fe4b48f. 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/ARF470500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4791c4679592339a465a5df06e17207ac2a89bba0ce423cce5ce2aec83913638. 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/ARF470500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2dd8951140c29b16156057922addfec41e0fc4a5768f97716fe15e30c10526. 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/ARF470500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57007c8b7ab87d645dff6f1e2f1a5ab7ad969e91048223fe1e5ab56c3f6f7193. 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/ARF470500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8560d0f2f648fae10e1b38f6347df1df1d3f1a8a82103e7ba3e018aaf094164. 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/ARF470500015.