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 0x11654222eb297485103057d267d0b8f8aaef91c64a2817d7a640eccbd9ff6fda. 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/30fd7282-2873-4dd2-8e01-83590cfecad4.json and https://artists.proofprofile.net/proofs/artist/30fd7282-2873-4dd2-8e01-83590cfecad4.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 0x19f9584de05a90d8084c444b684998ce378a0964940e15197f583c2df5cf85f8. 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/TCABE1232176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cea29104101e4717599c853cdaafe1fcec79f2dddfa024b057314ffea14278d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCABE1232234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b57f717d0af0872fa8191feab413e7712c1d1944f94769152b622e53c8d2081. 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/TCABK1224766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246998c573389953df314504d75f46744ec71c3ae06e10c33e40252f3d80642. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCABX1423262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1953aa823fdbcc50b8c0b288f7d8579a31bbe35c2cec6aed0708c14193670df4. 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/TCACR1647978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df12df2d02a1a4d3fc6e2562b46e2b86492caeb3f62642a0dd81bc4f2dbe12e. 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/TCACR1647982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fbf4092b73fd7ff78c4eb251b44962c3c1812bd656d00dc92605a484b02a05. 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/TCADW1888616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5959a63789f291a511a219ccdde198eda2a1c6881a21fa2967041e2789c1bbae. 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/TCADW1888622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec5add61f4930108a44baffb36eaf7503be329a63b859fff32d42f5a41249c5. 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/TCADW1888627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2e8c30bbb20f0c49df2e8c82a96ff9edfb3ef420bd441ba87b3e234058ea48. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:08:54Z), 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/TCAEI1950062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622e3334e05d3a8c0ebe460eac8b172a5aa7d306065dad3a414c010a1ea7c1a9. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAEL1944128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0d066c923aca120f18170469c0e1233daf9576c18ae234c41fe857a4c072bf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAET2008897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f3a314305e848a8a34c60a0afdce425275135c23d4f4baa5d61599b7d2067f. 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/TCAES2093967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532bebbef82decf5479d175670883b2a5d7dd5ac0af5b0432c4a51e4e44ee7c1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAET2004502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67973c2897210b1feb1db192f9de81ed37b9539672c4444595128ba3553614ea. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAET2009068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c58acf9ceeba7a12e985b3db6bdd9b7e5ab83b8f827b77c6bb4f015d28eff5. 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/TCAJH2559662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb51e33b4d0db612d2f182e8d0aabe8ce484ed83d2c27f791de15fd1862e84. 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/TCAJH2559702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023b8305e945be4fae9b8b8f6b44180b63200a272e2399f5be072635d98b8abb. 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/TCAJH2559740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e9fac93fe7080997798b9014b78d1b3dc496ef8cf220e2005d067a436d6e42. 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/TCAJH2559844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ddf7b02ce48b214528b15f4586f866319836b3fb8ee476d3161fd9839434c8. 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/TCAFX2124131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742eb3225b2c7c632db1bef18814281704b55ed30f607376bfeca379b0456500. 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/QZHZ32023394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796881b67ed068cfb8c2717fd145c9d2596a9a539e855a52b4a6065160f4cb7a. 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/USQY51056490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a9de39760637c605cb9ede96b7550f0acba5c1542a8c3580288ffdf1c4857d. 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/TCAEZ2024946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf14411acbf0aabb82ed9b8206d88bb3df0fad966a49b15d0d1c70da54b4f7d. 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/TCACH1558330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565ba3af8c0058cfa2cefdd57151fb67f8dde81b267f49aa4913de646efab219. 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/TCAFQ2177330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd976f8410d28423626f9482f83daf198cf2c018b0fbdd5367702ce77535cd78e. 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/TCAFQ2177334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3278d015e0bf950e7dda4c366ace9322ed6dc195036cbd5279d66650decf9a9. 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/TCAFQ2177338.