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 0xef201b74aca6141ab09861a384d51c7da45ee6385bfb85ad927ee2e0a59dafa2. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5117e4c-fa52-4e81-bf37-fee05495f4c2.json and https://artists.proofprofile.net/proofs/artist/c5117e4c-fa52-4e81-bf37-fee05495f4c2.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 0xa67e3f828fadfa8fd12ad4daf349699a914a571eb2c66e03d37f04f372fe8da8. 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/ITP842100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb02a0a1a49c3e0a8862d48e07a4666414a6423ddad2d8549f2df86e2c42430. 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/ITP842100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26c4bd8a19fc0f4faecbf226bcae68fb68fac8945a93a87b69982392b383274. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ITP842100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fe579a556481e4d4e22e62a60e02b899096fa81bc6714a72351968b43b1d99. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITP842100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529d9f830d65f0b812951cb771f4e4ca38ef7e4aa1dfdf5fc08255ade26b7537. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLFP1768089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7311b0a827d9d62fff2da8fbf1e8b6d86131c21298c4cc0db3bebbe5013540e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJV2330793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b273c089947c053b13345209002ac312e0e2911857de3f9900bd04ea1de589. 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/ITP841600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcfcb1bb7556cff562f1901ad615cd4d5da750b3d18587b3b7f75636cee8978. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITP841600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c544e7eb241cc7198408d2ac599cb0334222a43193406bff0d1aa3904c9849. 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/ITP841600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f58ab09e45a78dc624402f9abb069d2c812864ee430bf2a4b81b93501002c53. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ITP841600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f5cc296f5d04ce6dce26ee06ad9852518aec00566415f20fee761a2fad0927. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITP841600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac059d18fe165fe0cfb6e2e113fea09fdbefb0fd79a51b3cfff8b4ca46e25bf1. 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/ITB002400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2dc72a3288169ee16b44eb0c58d7a26ca65a7308d371a99c8e8e2a91f31f4a. 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/USCCW1610952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50a0b5b73faca81b2328183aa10b74e64bb4a6fb2c05a4227b3248a47264b2. 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/USCCW1610953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7984f92c58cb8926d004d54cc6c051cfb1ce8d4a35fb9940ec6678564d460ab. 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/USCCW1610962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e70478c5db44e13c0b25943197d7695e09d41b41d75344529381e97029edc4. 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/USCCW1610955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62817172e4fff102d837445ae39c24cac4f295d2b0f615e38e82ffdfafb682. 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/USCCW1610956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf712ef881bc75240b3ae6e77ae06c1732d9dc873636f67942ddd0f878b4b4753. 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/USCCW1610957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fc36217408b3fb628e110260464a9b9c8a52f2b101a6d5f142237929ffae23. 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/USCCW1610958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e374bbb4a306410883b2e99f737723c689abb9954c146960ec220b1ece28881. 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/USCCW1610960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1732f08bcbd0c9667b1d0ca1a7a96ad24a5559e4e7b50ae2cfad6324bc8da8. 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/USCCW1610961.