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 0x652d2206498e5b45284f5f62ccabb7266815c3f7b83bde26d7c061c56e292a56. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/364d0f8f-7300-450c-bd48-d6e28de59962.json and https://artists.proofprofile.net/proofs/artist/364d0f8f-7300-450c-bd48-d6e28de59962.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 0x713132033e3bc97aa348108240720fd44475a1212333399079a3f8d5b4546d60. 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/NZMT00902001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1846c4a27cdb6c57a551b160b23eb1f45fe65cdac1ec2c994bf321462ca7cfc7. 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/NZMT01003001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8858f7ce230d4c3a16a3166f4cba1d09463530f9aeb7e892541fd3a59ceda3b0. 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/NZMT01003007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae47cb10043e569d9575fa1c33cf6b8c77d144860b3d781e0514d6b36706755. 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/NZMT01003009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e00422e38d8c3013c631bd358a357b85cf88dc395797fc64898d8a84c0332a. 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/NZMT00902003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477d97cf0361a0feb5c0022d77e933773f1557c4bdaf7e0b863aa9c36b22657. 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/NZMT01003014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a5914c1e4fb4531b34c7a31cf847afe1ba8efed2d762e2067ac96505f96e24. 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/NZBO00800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020cbb24e4d36ef8562adaae3f173c92905fd6b7d1fadd6f90ffc364d4e45ea7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NZBO00800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8152f28e0b8b5760e1e64599668676afe966ed92b4c7ef7f07e7d7a4daeddf2b. 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/NZBO00800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c6b272bded05c82cf7c0b58185eec3811ee9cb79c53332a7cf499b6cead1c7. 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/NZBO00800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4ff172ac5c63d8781a49a4b370be7c46d8dac28058e9cfa56d4cae678b88fa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZBO00800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35db822ccfb76ba235b79dd77952db49d413fe4b186900bc911ad71d51cad9c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZBO00800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73c9bda2f0f05660cd09f1555859df17bdec05e738e0554e2c1a09ce2d8484c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZBO00800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe538858b98351c8dc0c70b385b27bdfa2d642cb13681cc3478c266f54bb03df3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:27:18Z), 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/NZBO00800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc731012a09e18881ece0193402b070b48a4ba7d2e1d27527737a5d2024246bd5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZDI10900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061d5ae893f870ddced02fd15659b49e02d6d5cd89144d1e016f18b81dc6258e. 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/NZDI10900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809411ed9a9bb073b8f2509467b962d95e2759860e0b7d3fd1904424bfc1082c. 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/NZDI10900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6940c19bf0e8f1c1eca212975659bb08d464317a8aa09caa94a54ded9d1491. 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/NZDI10900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751af0839c012c4875a51e173936e653a5583fb87c513c68a36eea12d7dff184. 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/NZDI10900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290025d18cc0a08811cfe2c4c74d7f4b421483a56a4034b4e7da3a79e03cbc9. 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/FR0U91400488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefac66fa6989bcb69873f035cd7e8a0b23d584014c2c20a4aa0c6a60b2476091. 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/FR0U91400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c5b5aa8b618081e89bbb1a333efc060e284009afff84818dbbecba24ec6d0c. 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/FR0U91400522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f427e0c61e865f0ff92b9d1f99ff82bca6f3ec7d7a7edf09d7a53cfa95f337. 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/NZMT01003012.