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 0x47719e3b288d6c764a70b2f679f684dd9ebd14aa2560b96d327b4660bfbe5e44. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f6a1f8f-0c15-444f-81ab-60bb07766a49.json and https://artists.proofprofile.net/proofs/artist/9f6a1f8f-0c15-444f-81ab-60bb07766a49.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 0xed151e109dd8c478c3d25b28ee5513d72f8fda71a1c5e30e3def7813b66d0b1b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:57Z), 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/TWAE32001404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980a91739fbfc95c6009fb1843b95d523d1c1da96293e79ee60f951a1a126c52. 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/TWAE32001405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f1d9d47543edd9fddaf935ac50f9af57f02ed45762cdf53159aa5f402d04b5. 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/TWAE32001407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90e72979016e97f84c631d633526f01bde74860cb032ba171ba67c40072fdff. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWAE32001408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03cc95ad238b56e12677730862a22fa266738bf99d95b7688ac2cf07072d87e. 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/TWAE32001410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a3bdfd664c5b7b44bb3a3d799b95d6ade19d8ce62b36567403d73e07e14409. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TWAE32001403.
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 0xd33411c19cb85ac667fa55a1ca2ebfea25951f26eab5d29bf61f4040cf3dbca9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TWAE32001406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8787661e7e40ae702ebafa885f9c94620c691dc00a17517e6f439e021d8aa4. 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/TWAE32204465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344e6ada213dc822c23d72b51d0861bfeb863d19f8d99824103f4acc9e9f4f6a. 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/TWAE32204467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8752ee459d8ecba8f5e38fb6a65a4fccefc2838ded074528f71903852ad9e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TWAE32204466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b58fedc110b9daa1d5f7d144d091d3bef2e34fe350874419500307498cc5d5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWAE32204468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeead7792398ed83d1a68b7fc3059f6aeb3094b50171c7548e5fe5a21a17aeda. 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/TWAE32100694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1ba6c945be75ef5b836e21ee7547b2c2fc2de665468478504a524f460917ee. 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/TWAE32100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff93e4f38cfcfde726fe687d6be741859fa7f202f6de8e514629bb2871f33e2. 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/TWAE31802078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780da3eda73060af184a57f31b32f255bc71ad1ddac234c3a754a7e07d9f8bfc. 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/TWAE31700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fd911bc4bda2ecebd8f88e26beb328b957a46bd92594214ccebee9149cf781. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWAE31700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e154615e5da5b8e58c3d9da868cdb785e2130ce2287c820c86bf193ac6b12ff. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWAE31700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c023ce0e100c9c6da1564020d260c708d3010a3a04d17417c5833086902e14d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWAE32403820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888f1633ed770f233245da03b2d6dd091219804f52c669deac4f21126706d0d3. 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/TWAE32403821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d2615aa3a87680970b0c8120d3fb59ab331316ea1f4db56c2a8e889aa4cc9. 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/TWAE32403822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e2c94c6ae843a85bc2c80832540438beebe4a7848c2c21274275ec507b9cf1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:32:26Z), 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/TWAE32403824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2e1d20231501173d56784383ef51f8a9900abf538ed5b4de790cb83edb68e8. 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/TWAE32403826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdd448795ca6a4f17eab3493f155b1a6ce31fa1b8d72452d1cba51fc4091c12. 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/TWAE32403823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f44a7bbf1ac3773fba42a77bd8443a14fada6fd3a77e0d0746d7173cb845ae. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TWAE32403825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17a75ee141148d7a123fc97d622c332f325b0cfb6fff57f1bd903c92d303caf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MYFU12400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99586e35f876073fae0cd38b6429222e5020a7dd366bb75f06865f0b7b8fce40. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/MYFU12400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f40687b232bd86a382ad332439e284efb0b3a3678c8cce769088564597c011. 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/MYFU12400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d8169e205a442aee0f527bf18aea5134afc83def7ac0a46c146f297771a165. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MYFU12400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50c9465b4cdd8b1d01623f97eba108fc906b09e2607e98dbec6b6b6f2fbd9c2. 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/MYFU12400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bab9c2abffd168342447afc59e7be6a250e49e7a9a1cef9c759d437adad851. 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/MYFU12400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c8b9f4165fa43d497a72cb5fa641eab2e2a875d6da77132b8b14870ab32300. 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/MYFU12400144.