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 0x953a877030dbfcc0ebfd54c733c06455cc9c3a55af23929e63fcfe94c5171be9. 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/4648c090-b831-47a9-96ea-0cc2d4634bd5.json and https://artists.proofprofile.net/proofs/artist/4648c090-b831-47a9-96ea-0cc2d4634bd5.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 0x4d6602486eaf95ba9df9f1c934ad093da4f55db7ddbe312c42697bb98116ae6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGH0641893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aa7e297a4b527f1d63ed5d7ec52f1921dc610f695d171298cdd5360fadbd33. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USCGH0641894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb15cbff8f3bf7a2dc6ab3fc70796119e95c21da1750b74f4963913ba3e27a61. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH0641895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5491b03543fa968b30bd8a5c1d8943f33558987a95987c7dd3e9e471cd7e8e7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0641896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3b2bc43829a4961799fce15030364c04b923148e83ce08940ed058abfae0b4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USHM81625888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602749a9446e381f085b76633a569a9a588159214d046c38ccf8a2eadabe8ce9. 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/USHM81625892.
The Killing River (Without the Sun, Moon, Or Stars)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a77a5354fc3b32f308bb3633894328d0156b5661ae4bd211f3ad5a35d8647f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM81625893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddc5a2cfcfc38551286deb41cf0f8617078d7be561bdc11646fc61e9388bc05. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM81625894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd045cac17f4dc5f7cd99ad042523bcd4d5805f95b7f9f3008c6f4815195d9653. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM81625896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd006efecd0dc52ebdd506c3faa85566fa02a03ef76efc82a597d12738ad7db. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM81625899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4ec5ba5a5294f75a71ff3b1e5ab63573425aa487d5528ce0e4b4f36115accf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USHM81625878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c605bee07024ce99686054654cdf8b506d75ebc2b4214fd4baa3459842514. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM81625879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8b03a9e364f3086450a2f14bcf9974aeaa14c42ee4d593756b574aac33fdd0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM81625881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098327f9ac842cc6d9255b73472880268e8ad6e0efc634fde9696f95a9e00198. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USHM81625882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53ac84144e9960849b8dd4910222054a0168e2608f679fccb982df0dd7338ed. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGJ2539485.