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 0x884243c8f0488b2997ff4325d20f8da95c67c581141d370ba7205e7e225d412a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f095898-bb9f-47a1-af72-19eb2f7566ad.json and https://artists.proofprofile.net/proofs/artist/3f095898-bb9f-47a1-af72-19eb2f7566ad.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 0x5517b9faa870f20724a21add21467573c413cf7dd466a38d1c37518a2d9e4236. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKADG2300637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845411044b726f467de9961d345c82f99703b085f8784a354fa56f89afb81cbb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKADG2300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fd5487c5e63de030ebbe7c8865c8d9172fa92171485eb723b2e68b6e14be3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKADG2300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcbbc6fcb7edf8a0c84d97d1af18096b4ee6a9c0776e1ac8f32f442dfee6e0c. 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/DKADG2300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6be8c997fb79231a4a381a0b43e808be4c7b9d3003f55364d013db05759096. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKADG2300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cac49cce12573f1dc61c19812cb5f5b3c21455411ce2e5a60917dc2bb88a63. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKADG2300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cc586b4f27cd9c08f9fadc51a89ca6305fc836e3c863939d0cf5b236e52e39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKADG2200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9607572780bfe560070b270e92c9422c535a7e9c19a1c7a7864ab2b29f07b2be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKADG2200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedb0889d24c46f8c421257ae8fb8e0bdd4a40eaf647801760fe69db7f047c7d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKADG2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a1a27508d554342c5c497743798f8941dc7eeb7ae7e93b1c8d7e875d505607. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKADG2100834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d024afbc2e4082ff470befac59bdf285377bfc7d24b976adc9d78f6646d1ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKADG2100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc553f5067656f2c848202f4d16814d34ed15ce4288bc4c6cba7a3526479162cb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKADG2000970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda8854455ad0ec2709dbcbded7fc0d93948238197339e50b810671decf77312. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKADG2000722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e30dd4cf4bcb6e729517bec0720f16cc9de519178d2731517f1ec990c95d01. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKADG2000718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72051eb9f1fdab961d4be66e2a0eba5bd8e71f4bdcfcddefd27a01d15e5f0ea1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKADG2000489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef90a05b2edb74ca6bae0fd4c0452e91a2dc28d0b5fd2545bcf9d0c521208bc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKADG2000295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df90ed0ba7106723deb71103c75e5c500275738e922c23c6bcb5edef1adc5b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKADG1900753.