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 0x9479ce3da6e516450a3997e6122ea59215bfd0f82b5be22eebf357b036c63f88. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a40f5fbc-c67d-4758-9244-935b7997dba6.json and https://artists.proofprofile.net/proofs/artist/a40f5fbc-c67d-4758-9244-935b7997dba6.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 0x97aaf22c42a86abe905964f1b88bad85d99f59c4f6de67a12e37b55e57606d05. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZDA72052237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963cf843ee2447543454f494e20c88dc814fb40259e0d4c94859f91147990e74. 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/QZES62033386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a39a2b6ef37a1f80d8af83ff331cfcdc17e2c40799be8f74421bd7043ad6c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZHN32033878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7c7e22e6163763e4eb64b8f52039d06be100a59d69bb516b9445c842c77ab3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZHNB2054322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aa046c8bf9cd27d80d6b6690bd1fbf53c645d66ca1183b3f63b5dd1c085dd0. 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/QZNWU2041866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd6f4bac05e37710dc4aed318cd252dac007eed0dfe88864fc965e8935032e1. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZNWX2060534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9634ec028b516beecba7c7d0fb22f26fa6d6a86080fff6362035700243dd52fe. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZDA42134101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b99e8aa0ef5743cb654ce5e6300fa7f00c01b840c2eb16a16ad55647e4263ea. 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/QZHN52106953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2abab55554a0676336aceef61a65cd43238236d01f587f1bb88090ae85d1b4b. 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/QZHN52106954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fe4a2dd80624b3f4f97392091a5da4d8a2bd6e89d962861f047e4bb7c9dad0. 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/QZHN52106955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d2a73384a4c97deaa2214fa6524103d0ed41bb41ebd3bce6d3e48e98080174. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHN52106956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7e698fa5114fba801e1a8bd38d51fe752148737c302747e0eece33a8ff12e1. 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/QZHN52106957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c0f709c1bca05cc0c75fc9592701c7d80e362403dde8c68e6bd4a5cc2b4946. 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/QZHN52106958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a7726d9819261e6dbd0ef62f51a2d6e2d815fd8a776fda0fc88bb6316f2bd. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMEQ2170818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f944b23da02e7ef7650bd1a9d68134e73ace0504883c12b473da3f786e10290. 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/QZHN42228010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2874d65518f7f46bb004f4fc11d5549fc367fd66ce77bf154de9fb18d1f2000. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZRP52202812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbceb4d984b71b4b457bbba2fed9e58d4fc111e56faa395c00523be1cba492e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZTB52233295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b0660f1809460bcee1b2a001a2fe4c3b4ce37bda2d1701143d68bedadac99. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZFZ22356881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ad9a06514a795f18f703d58c395874a049a1cbe713290b03d4add1408975ad. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ22356882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69faaf80bc166072794c8021dd067a0d960e38185a39930f18357c9b8a09560c. 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/QZFZ22356883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21611fdafd89e79125d4e2c36e8afbfc7921ec37bcb32b600a6d63d554fba42f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN52395926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa416dede04b0f61467c5e04863d6e7873ae6de314f653f558593e59fd184a299. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6P2345441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8391e498b0689d74e99b5787ddb2941afd657979dabae46d38ae2f2bbf85ed88. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZTB52384974.
Can you feel that it´s Christmastime again
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b54b4ccb855fd0a4092769c81000523525664d25a370cd0723f959dfb354c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZMEP2442302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d14bca3acbe3394f9f368cd1b82a84680248f58c3ac538a22b04e0714449c. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZMEQ2427596.