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 0x602c5575af541dbf5455bdff92375886821620ea0bca1ad14b92b1cc0164375e. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db947754-ca34-4b5b-b04b-192a20403a42.json and https://artists.proofprofile.net/proofs/artist/db947754-ca34-4b5b-b04b-192a20403a42.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 0xffbd5e30e4f4d374881b4d93b1c01e226e88ca50303a269c000d517bab75e6a3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWQ2390182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b24ac87a769d3985851825e940eceafdc3dfa62e86cdc0a6ab7ee4629ee8a30. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP52396643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfdb7218b3fab3b71c0112422b0fa4ea4f892490e173d8dfb20b8946b19119f. 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/QZK6H2346997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aacf52c1b1ff3d0993e1804e6ac4615031e0be6a5512918cd4fea701e246b2. 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/IEBOE2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aacf52c1b1ff3d0993e1804e6ac4615031e0be6a5512918cd4fea701e246b2. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/IEBOE2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa493b15ab1fec5d5d9cf31018e1daffbaa89670c8eba3ca8f371329becbb6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/IEBOE2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b179b059850c6118c9b4da2cfc8e590e42e5f6f472a8dced804f4018467639d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IEBOE2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f762ea55fb197866bcb9630998827ecb2bc13c3007ef08edcfcd52991af3667. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/IEBOE2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51599c1426bd303e246f5763911b1a788645d10df189b07ce341b49512c2cd3f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IEBOE2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b9313db04e3c4c1c92008ea9e1e9330a607d934e60cd4bb5acf881dcfc2bc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/IEBOE2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aacf52c1b1ff3d0993e1804e6ac4615031e0be6a5512918cd4fea701e246b2. 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/IEBOE2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82106846e6818613d1e42072b9874d46f42bff3c0e76c94491995c547beed0e1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/IEBOE2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b179b059850c6118c9b4da2cfc8e590e42e5f6f472a8dced804f4018467639d. 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/IEBOE2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d66d942d4d34a0408de51e0b7bc4ddc27790b1f38463279ece80365af456e5. 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/IEBOE2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa493b15ab1fec5d5d9cf31018e1daffbaa89670c8eba3ca8f371329becbb6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/IEBOE2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b727b062eefcf122921726e77a574653163e1a3f426384709d78cdc5345118b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/IEBOE2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3924f8e739b5f73f25fd8a702ba5963e3845d90daf697e8c76c4cd09c19eb. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/IEBOE2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f398408728f53a27cfb07e7b72ff13774f91db7ffe76a568384fe635ff04374. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/IEBOE2500013.