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 0x77320379d6d228ce3dea886383421036f1a1698ebaa46fae43c5973acf7bbb9b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58f18ab7-ea99-4d84-a89e-1add546036b8.json and https://artists.proofprofile.net/proofs/artist/58f18ab7-ea99-4d84-a89e-1add546036b8.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 0x54ecd57fd5d2ba1051c28d380f9e8d6afbcf20086d5ae8d6c9d2e0e13f4edeca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2387424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ede43fdc08a6bc6f2991e59d249d403721e8a8c7fa123dc4e1a00a18d5e48bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INUM72200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1f0796fb63dd8b1398dd4fcb61b0ce6e7302a3a92a9abde75b98544dc36f86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7282465279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319e1c2d6a675a7f253bf26fb8373dc60b896a5f6c97e1209f3f436c7937efe2. 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/QM6MZ2473037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a362f55a7665fd1dbc16c1d87d5dc182dab900043074c2c28d268b93d5ce955. 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/QM4TX2436099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3b57e9578acc90665bf6659a43a4d25d04d25544b4969427ed96abe5baff5d. 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/QM4TX2404628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9b83ab43f6ac4a6ab65d26f321f9f6bde949c6e483b664760496aac84afc5b. 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/QM4TW2434496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6533bcd5910a30f1ae92655544d4ac54465826fbaae9a4a8bd0004d0898dd1bc. 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/QMFMG2304890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a74bb1dc7193ce7e61a7ff372873881425dc1ebf3983f703b36381b8e5c06f0. 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/INUM72300637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3cb2a19899f0cb230f049a238b072fdb9021323a16a3f556efa2d66eb6652c. 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/INUM72300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd9c4d7d39cb8bc30b0f10b3c4b5bba37207fe07c4269633b32d0873b9508e1. 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/INUM72300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b2bd80fb86ed7f2d59d0727301cca6fafabfa6627430a6dabb6c8f61bfa92. 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/INUM72302881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58b2bd80fb86ed7f2d59d0727301cca6fafabfa6627430a6dabb6c8f61bfa92. 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/INUM72302881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd9c4d7d39cb8bc30b0f10b3c4b5bba37207fe07c4269633b32d0873b9508e1. 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/INUM72300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3cb2a19899f0cb230f049a238b072fdb9021323a16a3f556efa2d66eb6652c. 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/INUM72300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a74bb1dc7193ce7e61a7ff372873881425dc1ebf3983f703b36381b8e5c06f0. 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/INUM72300637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc066146778f0e16932f37af771cde205f9bfb085680a006854e9445a9d566eed. 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/QM7282336615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f0f4f9d9a2b69d7308533b39b8a349ea4a9574c7a0d6c3b4738f7ad360bab8. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/INUM72303062.
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