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 0xccaafd6508666fc6d649400fba73b4f50634cb5734ce2ff1cec193c8f9b73917. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9abaab5-14e7-456c-b288-77023d50fa4e.json and https://artists.proofprofile.net/proofs/artist/a9abaab5-14e7-456c-b288-77023d50fa4e.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 0xa11c4bea7dc74f92dde7315ddf15efab7fc7d7e6c19ae12ed19e80b4c34ac3bd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA62210076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0ca2a56cb70d429b503e62d075f96ffa2a62a7bf6e4b55f7e3e74539216a82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62210078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84777d831a1efb42ddc57110d38ab597994c41f43c83f90f707c9ded41b884d3. 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/QZDA62210079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28ec7e38dc4293bc3b93355ce41fc9abb5111d18a8e3a5f7c0fa2bfbc3a078. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62210081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a4132bd6621ad0e5465d5ef3921dd6eec63549562a2f5729c6da1c5b0d1311. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62210082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47c2481ba78777f1f52d8db6bf65e7f2f78d1b20e44e51406c36895719217fd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA62210083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b8a3993f16569d24410517a03c2fb321d9f24422c3c1504415e0377ea761e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA62210084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c60b82e41263477e9cac46834aa76c6a62ae703ee4fde007af8669c8c4ceb1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA62210085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4210adaa5bd63c8ef4a20ae830a9627b63e137381dd314ef4673e2449990d143. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA62210086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ded2f61f66e9778270b2b95828478ba80f716a29ccebec2e215b9923c2e135. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZDA62210088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca3b910855a983c82845b3560f2cf136dfdb5f9af86840736d3d8ed4b7fbf5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62210092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871acad3fea65177192f10431af0b3fed57101b4e09cf184bcde1837d02d78fe. 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/QZDA62210093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01824f0bc0f90d5cafadd3be0faaf499c6501903452e255adb36eeb7a788d9c1. 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/QZDA62210095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb4fabaf97afa528c7f7b5167a9d5fb93a48cb736f9ebecfcae65dbcf61da9d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA62210096.