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 0x3010207e0773278f53508612c698060bb72bbbf75d742ed0ec7590ec57dec211. 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/a7423c08-f118-49a7-9c0a-ca6d540a10b4.json and https://artists.proofprofile.net/proofs/artist/a7423c08-f118-49a7-9c0a-ca6d540a10b4.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 0xd7d3a9b8d2c5c8db2123d452bdf796da1ef3b509a025832d296e65f4a4eca3ad. 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/QZ7R42250188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62b40195af0222cf128655732f6e707a1bdc4726f35bce6dce20820a092e8a1. 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/QM4TW2447148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125b5728d7d79ce226bc56b89588f6bb132b3145c4e3247756f016268afa377f. 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/QZ7R42251598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce0367bc0edbb652de6883e03b84f5e2b6fcaa09fb5430214c6f571201594f1. 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/QZ7R42251096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20af1dea262dadcfdffe6de097b02447033974e9d6d45515e46b2fdbcedfc890. 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/QM6N22426207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9548fd3d3ecf1ff76e1ad42432d2e5ced4faa1e23019b36154bf4b8adf632239. 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/QZ7R42050684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420b6bbccec57f4f2b445c526066d88093906d6b872c1a61c87811e7c1565d3e. 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/QZ7R42050654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71c6753e53381a000f6e4648fbc8408f2b8e6ed3b38094437b77a3fe6673d0. 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/QZ7R42050655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7cce2c1dba0cc52947a0b01db173c74754228792c21acf0a88b11499f0e4ad. 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/QZ7R42050656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bdefd410f5ada20eead0650ef746ec88092086740bd6ae07a65fb10f4b46c0. 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/QZ7R42050660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a58eef142a661431a7c7838c1a571f5031a3f88d5c53209b4185c4eb637c89e. 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/QZ7R42050661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57971146564ab109d09f873e8f2f178d1bac55992f1deaa6b7a040cdbb3f7c52. 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/QZ7R42152365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114fd28e7725b965850985bfc03e79d321dd7552a075e870986152b50db1a68e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2422495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67f971b9bee7c55d0cb85d5566635ae0291a0f8834ef121ab9a73b24350914c. 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/QZ7R42250069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e5ccd9567559f120bffb8ed184cc6ce69a14bcaefd27a33be50945f6cafa9e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWL12300918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7059c3f79ccd8a0cc3dd7f15ffbd917d1cac0f1c59c5b95607c035a9c1cb97f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWL12301164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76954bf556e5c07db0caddb3d91ad5e13bdb427ea3a10b22f815a31e1fa992. 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/USWL12301168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c98444f2c5b6526648e7a54d1edbfcbae9385a4152b50cdc50a00c13f78cee. 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/USWL12301171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdc09527c5611162a31b4f4fe096212a4f3c623d31b0a4d02f10c469a5e5540. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA42537837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41230309dfc57c47684dc41ddea2fde70bc88b76d04bda15cd0dd9c2eff0e62. 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/QMFMG2355772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc45b1e51037d1d1e4edc81ee38a27f9f793c2903e3fe92d3e832db3b2227b. 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/QZ7R42251611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeded92c318adc87826829a7edc9504f40d72336f301a615afff6909bb57b8821. 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/QM4TX2594798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e5ccd9567559f120bffb8ed184cc6ce69a14bcaefd27a33be50945f6cafa9e. 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/USWL12300918.