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 0x14805a681e8b49885b832987b6489c0b7b4c915e599a317c6b25ee20583c5b6d. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f3bfdea-676a-4d30-a72f-83b10540e6f8.json and https://artists.proofprofile.net/proofs/artist/7f3bfdea-676a-4d30-a72f-83b10540e6f8.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 0xf365596160f639cbd8af8b81bf2d0adca4c0523a02f67b498a004c9b794ef177. 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/BXM841900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488faaaebaf769e784fc11cb78afe5cfce545ee2e203b6f24d26847914565bf7. 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/BXJEE2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164eb2e44eb804abb8e4d2091a82dd8c661149216c9a040cbf1a40dc723a8e0f. 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/BXJEE2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019dc9c0c9c6bdfa5c6a3c66c3c074165e9223822e25e904d13b79de36b2e4e2. 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/BXQMU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c58839bcb4b983cef083af0f4cdd43db949358607651b397151406dfb0840da. 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/BX50L1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe11681ceacd228e272c22b8ae2722a4c230d77157a31e742f16813d6c2cd01. 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/BX50L1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd3977082d77031ed40d84a4a2027f653d796b519984be4175507eb5c2d23d. 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/BX50L1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668c0f35bd847770a854d3428ae9505f89862712ee97c07602ee434091d303e. 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/BX50L1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac63c61825aad30c948b121f660b8b3cd02c0b95ce3979dc1c34c6feec3f8ef. 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/BRC1S1800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1743e0bf88f62f08e836e9eb57a66679db029f2d5d446d6a2bca58eb181c69. 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/BXQMU2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97d83f2f165bae5674d339998bec765fc63524e4221f294802fe91bcbb6a675. 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/BXQMU2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a2a7a5d96d4c858e0ec71f9504104d56e2d782283040d94f732baf73fd6b70. 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/BXQMU2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07f49fccaf127e88247cfa6504c2525fd05d2e21220eaad0970420450475e19. 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/QZ5AB1721218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a785679635b5f9c589c149b7d982c68b5c664ab5937a5d6b0448ed6cdc7445c. 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/QZHZ42164875.