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 0xb1db2bfba989c2caa87e31b199f80e77b7cc4cd38f8ace92a37a185046f0e575. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb9fa26a-b777-4d4d-8fdb-6155c604818e.json and https://artists.proofprofile.net/proofs/artist/bb9fa26a-b777-4d4d-8fdb-6155c604818e.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 0xa92fe8f6e4daefdeb95b6b2e0c977a37a1e0d92bac4a32efd393b241f58baaaa. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/MYA119000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d5f3dab396b7a5bea47e01d26842de8e79a8fa19d58141b385ce9e3be559a4. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/MYA118600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfe6ced6370095d169be9d6a56e212684fea166fff04e4888ecee162fbfd73c. 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/MYA118400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2bbe324529342c841546af4e18d4ec25bebd027e7a251031251fb5735784d3. 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/MYA119200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1764c2e9644bedfe20c742ecdd40fe9c24f071cf74c2c5aa71ea417df7a6044f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/MYA119200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15439b4670e683c9416e761e592bdec0e3fa1194a340b7bbd3343b576e3ed515. 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/MYA118300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b7ff0f72829d2efe0ef881f4b006168d1243ea70eca866719a7df48550548b. 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/MYA118400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f92f38b7ca475af35fef3d4bd41cdb2766e73eb9e16183f435452c00f8908c7. 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/MYA119000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba5d9148475c3c3f7880501586f8ddca46c1408615268a8c4198dba01188db. 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/MYA119000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945e5fa335fed54201984356ee6719aa24a6f8ffe0b60e3de200908016c1960b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/MYA118600365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf228270fc22b408eac2335a3ab118204c0fe6c1b08e91972744e722fc4f8a56. 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/MYA119000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd382075bff48be7dc54ec76ed929e95228707cc05c891901bbffb9c602ad892c. 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/MYA119000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00070822de513199a0dc732301acc84bb14d13e45a61e0c8d43e77b707330cf. 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/MYA119200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b5156a8aca3b6ad3e9764e79f7739ba7cfae8441b6ccd0f736cb6e502921d5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/MYA119000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07ab4f7643a4712907c4d76c3341e20b37c60bdfd868f48974bdfcca869393e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYUM70900228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34973906b6e89c2a97e65cd19c8d55de5a5cb191c27096138297dbfba00c5371. 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/MYUM70900229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25413f2455d7c852783d105f22300b6acdd7921a13e2ad5d7052812c55b83ec. 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/MYUM70900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c978968f859665465c3be29a614c60e32f1c8f3c7faccd8e6fc09434b12e57. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/MYUM70900231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeb8b4cccff52acafc1d616bea3548de283eab432c83765f15e361a493c0237. 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/MYUM70900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4136ae761c1256ce17901f20061fd7adc64d108e770f2b68ca12e79c5f9180. 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/MYUM70900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f6486e64201bcb22841ac610173c2800b4b6788ea8de7367bf9514c6e00604. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/MYUM70900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d732f3748500780c1506ca9e9bfe36b789848fec89a2ddcdc5810792ebaafd3. 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/MYUM70900236.