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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e2a547325fa87bc1ec179672f146d1df1eef4163e7220cc9e71225a0969707. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df5b9a5d-a72a-4655-8baa-6b305e09bf71.json and https://artists.proofprofile.net/proofs/artist/df5b9a5d-a72a-4655-8baa-6b305e09bf71.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2e6f7ac89efab8faa1668fc8f4d9f84c4c82c85514270ec92f77be8ed5f3ad. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USCGJ2487835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecd63f0eaa02dd75e4b0e68136de7d40169543018afbfe06f9df78159dcc4e1. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USCGJ2487836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c2944b3f85ebcf0c8e444478371fde4873ecbad8ad1d4f3c3b8ae4a91c487. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:11:06Z), 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/USCGJ2487837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3655d0b3f4045f8c4b5f2c391a5abaf2771a739bf9ba384dd03fb583830d58. 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/USCGJ2487839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a828d21b09eb82035c96054d57896212db1d15d0ea4f8f9fc399d796db6b3f. 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/USCGJ2487840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d0d4f3cfc612c3319fc081948685e09d03882edcc32bf1473a40a842fa9405. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:47:46Z), 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/USCGJ2487841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd009f0d4c00ff2fa5445e3e152f6fde10afaef0c66d4d5a0ca8673dfcce2b5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:02:13Z), 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/USCGJ2487843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb98323c47bffdea7329de4104ee73ec3a3fd562e2d0ef90458803cabe4684a. 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/USCGJ2487844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f832abcd40c9dc1b6b9f4b624a4e15f87e3657bbb135594609c33f5d86c3551. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USL4Q2476639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f17e723cc72e4f55b1d6775672e96b2bca5cebd6d40e0a32813bcd96ecfec14. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:50:31Z), 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/USL4Q2476640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e322dc104830171273524d3527583681d5fa5177c6cb111d934915b20bcaca3. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:43:53Z), 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/USL4Q2476641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b723588393695337e3e821e1ba0d66c33c4f61e0aa43a5f0da6eb6903d9631. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USL4Q2476642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc3a95bf21ef97323a350b8607b0f27f07f16ec4af6c98b15d385e89a0e4537. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q2476643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7a51a1d2e426cc80bf37c2254572c8c9cea54afe476e7f3c5cca4e0991d10f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USL4Q2476645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee57b8705834dd6fdea0b72135ff793744d060a04b1bf63ef9553c65a79699eb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q2476646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f5b11eebbf65bfc4a0878a44f077a31883aecfd3c7c97d3ddb06c2d5f12c98. 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/USL4Q2476647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19093286f69ce4514c8bfd11ae77344c177529bc247c55c7a71a745d1f0d52eb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:39:25Z), 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/USL4Q2476648.