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 0x8acaf891e26b4256307f8329c04a1c888e530ad939cd1fbf77306c58bf5d34aa. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/384ffa13-71fd-4d4a-8098-31c11efa47a6.json and https://artists.proofprofile.net/proofs/artist/384ffa13-71fd-4d4a-8098-31c11efa47a6.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 0x5dd2400a6314041093a65ee321efa6ebc99f63c0335c51a9142b59f129a935ad. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAJK2513687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9a30245e185c5c6e49a73f7aadc518ae8069c254051afa24e13de291aa944f. 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/TCAJK2513698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bffc46daa0c33d5250593bb7ee17e002e994a55237858ceea6c1271e03b15d5. 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/TCAJK2513701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bcae500ac72ebda27b5a34f7635a1b87cf21f071b62aa3470fc97c754b6baa. 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/TCAJK2513702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a21b57df6fb628183c1c2ff8e7dacf268bb99ccd2a6a5add51341f60df292e. 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/TCAJL2513708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03deb3e24b224741a7a9eb342a4a972678b8a708fd8924fcdb38cee72f83222. 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/TCAJK2513711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee40accf3296ba8102026560ff3434020c516db36844ecc1a07dd920d9c537af. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJK2513715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe0336d39c1df1aaf7c3ec7addf881c636dc3fbe04bc9382a057ece8049b1c. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAJK2513719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb2f443653104ad9f42069e1bc76668e3a2b04754cc305135319cd30aace0ab. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAJK2513721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9fd8de1f41defa7da67e766467eb2f95c45399920f76325135fd99b324c3fd. 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/TCAJK2513726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2048b4e8fe5b03a97a6755b4711846690fae69fdd1a32ec0a7eb0413964cb5fe. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJL2513729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9c0de31b72ce6d5f3a9f5081b717a91d5d900011b0d5602241b10d28e36b70. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJK2513734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9af5205c1cc048ff0c1e0086e3d89380977968638bc4589a657b8333bf93c. 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/TCAJK2513737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07b0f44edccfb3d011ff60b59d0cf78dec742980e4c21a2996da92367fb8c9a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJK2513744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8473818b872fa11ac74272b2ef5571e4fbc57831c05802b6c81efec9ebc65ba2. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJK2513747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eaf4b09d8f06e9ab072356d61372c48eba588919554485589afc1f9390c512. 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/TCAJK2513751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc776ab36d70e49b1189c41b3f393b17eecf078ce1b531771590757025489c766. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJK2513754.