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 0x44e5b656f688786c5947e8217798918303b4da419db5c29c3ac7c8a2612ffc59. 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/9714f600-d607-40d5-8b02-17198757c9e7.json and https://artists.proofprofile.net/proofs/artist/9714f600-d607-40d5-8b02-17198757c9e7.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 0xe66d1a4a87fd8c1df3562a5c79a06f52931847ca7bc7744f7970bad0e61b2dc9. 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/ES75E2402575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb04ede8024f68933740fc54a8b2f07e08447a5b31b5c298cf2359c41e8c8bd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ESA012209187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98121b8b2c208040191cb99be89e2a2a602c52a238dffa552cbb0c9dc0246ef. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZGLM2188293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985f394cdbce0442d96e09d0aba4edaaf0abe37c0ae5ad7afd6408ade6ddd024. 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/ESA012152842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db38232e1a51e4b4026c378d0b0f12192e827323b8cf0464e90470f3fc6d3e. 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/ESA012209188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57654d3a52e5f8a9e0d093ca9c07589881feeeb37567b34937d95c17d50afbb5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ESA012209189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470ec4e15ff2220d7c6a53b642da855116636aea974bdc798bb7bcbeaa9e963. 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/ESA011543339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6875afbfdc51377ea58fd9f2be14d00151b2ea9621ba70ed578fc95a69fecc. 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/ESA011582076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd00745d66ffe0d2a505e292a7d189bd00535b0c2baf74f4c38d83d42de8c63. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ESA012209190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc670d20cc9733f0522bf3182b229f9afeaea1cef3d1b63060551a8d3846d72f1. 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/ESA012209191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2bc84e8876195208c76319dac9e9d331f738fab0c432a8a87a168403efa4cd. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ESA012209192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca6920012aae6252ad38d3df309c8ee8e9aaf068aabbef6307b99260b78fdb4. 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/ES75E2303324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470ec4e15ff2220d7c6a53b642da855116636aea974bdc798bb7bcbeaa9e963. 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/ESA011543339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb580d828bfe4ba423cb7292bc41af071b8198a65ff0cdbee83af9f29420bdad9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES75E2405895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5315de678230a7956021c16bcbdf00e06191d027ef25d9d44e4a829ead8b5d74. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/ES75E2305183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fad1be4d10b547226b534562dee1b844e3589a83924fcf9018203c66655bca. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES75E2405896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa7471cc685e0aca70ef6d2c03cbeefd3496001a53581dfea2cf5326e0b3c3f. 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/ES75E2403659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086893e98b298472c42e25f866c1069dfeff5086a360898a8186a85728693089. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ES75E2412595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf2bc5e3eac8d8607a94c2f9d590df495868b71fdc02c578f7cfdd3884a3c52. 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/ES75E2307318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efc64604ab2d742fdfabf9dc6ab62a46a99603ee924999c5165ea58528a22ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G2208047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a0fcf981d20ce0d84c96beb60517c382718acac519dc382697a31fc180ab2f. 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/ESA011533802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90ef4e9bc7a85350804e84307e9ee843e6b889a0ff29d845c9b027d35ca358f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ES71G2058646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfe319b8afc646f451c7deb02d69e246be561b1c09dfb5ec217d12e27de30a1. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ES71G2018482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80862bf322b92e118d3260b621c1821d86bb07160bf347693fc72b8838d4c0d0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES71G1921577.