Avance may refer to: Avance (Durance), a tributary of the Durance, France Avance (Garonne), a tributary of the Garonne, France Avance, South Dakota, a ghost town Avance, a brand name of the medi
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 0xf81e855846b8f4a1bfe3f8a3d9b6141f804ca5e4d9ff4d9e0b6932ec32068141. 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/e519d2ff-daae-4908-9a04-411ac194ee96.json and https://artists.proofprofile.net/proofs/artist/e519d2ff-daae-4908-9a04-411ac194ee96.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 0x4c92f49a146dd2581fc3b6f15eba1e557490d10172df7a4adf9e12e2bc123d97. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZ5FN1983050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46eec3bde0405c0d27410d899315e9398b43a9eb2339c80f555e9bf266c2abc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ5FN1983052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc37c7a87321d8e4ef1fbcf03bf7cc886cbfbdf74c46217733e7f30f7c98064. 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/GBWUL2026196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76d4eb4f9b628b61fc14151da5a19af42bffc4e7d183f6ec6636a16bb9bde45. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2115384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51baec87a1b4caad47629476c2ca826c3fd5945fee0830186fe9ea5e9e5d5cfc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CA5KR2115387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f4e5b9eec0a6267d36b2de46617263b77dca43a6fcd397bd259504b4235dda. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:04:40Z), 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/CA5KR2281018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82749692292a37946c12bb70e64b4fff728c4692f1273be5ada6cdec21cc816a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:32Z), 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/AUK3B2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ced64176d816d3f23b80cb551b0866cf43447872b05ce2fccaab26124de7d5. 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/AUK3B2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a88d2f22b3f9fdfc413183e44dc86fb0db4c34372121fb658e3fc017badabab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/AUK3B2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64991f7f950d7cdb59fbebea5d9e95e1b29b94e162dca0fc89adaf1d61fd4108. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:45Z), 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/CA5KR2389735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4fc722c1022952b8bdfefcb6086e2c9475f00d27c41ef8a9fd6a5bcc46f6fb. Chain 2 (Bitcoin): anchored in block 959110 (2026-07-22T10:21:38Z), 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/CA6D22400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0ad716a9d277cadb139dc217de468d24fa979d72c7f7afa15ccea9e9950ec. 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/AUK3B2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632ae9d49890fb5e6a5f9eb84454772cc8911ffbe4d3290876284bc570dbe808. 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/AUK3B2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bfb8b79560a3364bd1aed4c41d950d85ccf17a8f12329e2529918af2216dfa. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:43:10Z), 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/AUK3B2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0521e7cb5101050d86cd7d97fd0dbfe1da310176a9788b41f63a3605d32c4ad. 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/AUK3B2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798f0e0066970ff52057304bb6561524d2880f74ee9134b71d2e10ccaeb39b6. 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/AUK3B2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8698e3e7eb9a93e08d8027af151d44724bf600bd2815dcb4b22b6fa3b7fdc6e0. 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/AUK3B2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b2b58f2a74906159b0437f68d14e60a9e695689749512f92cdd73ee275ee55. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:23Z), 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/AUK3B2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b2db73c43d1a44528a05d6fceffb6f567fd3b232d538656a3a5c530ad5036c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/AUK3B2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74df8a54fe48d3b1ab4ef18782aed69e4376646159441e2f157b2964f5305306. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUK3B2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e68e89751b85df02b3dfb70ed5ff5d48f09616da74c355a95fb59f88af96614. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:43:13Z), 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/AUK3B2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15864485282b142831213d9e7f3cce5a749f2cd659c1fd8bda15b27fe2123217. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUK3B2500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b72ce8992942a1fba9f1e5d2158d20ecc6a21aa77412c3adcf46065d869ec26. 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/QM24S1808034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1d500700c971bd465ba9de7a157a008a81e2ab399321c2909aa06fc283d081. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR1966948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d616524e48a338cfc6fadca5948071ca3bf82b4ab51f56388475162d996d16d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2176210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ac206fa8269f7e7689778b939444219bf50cde272ec5bbff9ce391eaf956ea. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CA5KR2312071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ac5c914da2b5f6c8f29ddc2768efe4b1d1be270ebe9469462090aaeaf90ff. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CA5KR2056503.
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