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 0x7392f4878969adf496ab8badbdfb338b0b78d7470d2e8793ccaf205be971744c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9658d4d8-330f-4520-90db-30a53814bcaa.json and https://artists.proofprofile.net/proofs/artist/9658d4d8-330f-4520-90db-30a53814bcaa.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 0x295f54582618781f9b970246c26e48a8b57053d32f5eaa2a40a28e4cb6742525. 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/FRX201639342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5058001f80b2f082ccf9efc1b4c15f0be9ca0ecad7ef2f1df52b373f9a88b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:35Z), 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/FRX201639343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8059a656500c4ba4a4664cdb872f6ac0d18145477fa046e1633e411e8cc91aca. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX201639344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cb82aa856f409766f4bf71c8e824f5b18d15f2871fbbfaeebf81694084f7cc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX201639324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295f54582618781f9b970246c26e48a8b57053d32f5eaa2a40a28e4cb6742525. 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/FRX201639342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5058001f80b2f082ccf9efc1b4c15f0be9ca0ecad7ef2f1df52b373f9a88b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FRX201639343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aef90e628a3b29aa7b23236d921c7d6a8b4b518d09414f9c74120fe8cad1cc0. 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/FR59R1766360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e174e198353e5e5ec41c5149ffea279b49e9f8af1103fedc96fac8bcbe20379. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FR59R1766361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad58f567a21c3311ecb6b5c4a333e55172f905e2696a96f655acd28e733c92e6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR9W11832155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583a21dba720af3c98a127635e05705ea2eb48991db6ac2b4ac53b1c67f864a0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR96X1813780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c48a0c9557b3b75cb1706f75c1d42f255d9bee270e7b31fec31760371e8956. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:44:07Z), 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/FR10S2039300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6ec00a97a65dccc0a8e01d53b61c5ec26b672c5432e09df8c42ef9659b658c. 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/QZFYY2224645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbc9165ed9f1ad3c49ee6c6e7a7cc874c531951b94ec2a53eff8e57ef109d45. 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/QZFYY2224646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40080da8f2042cc95dfbb391e20fa700581c26abd8869e11c68d2239a5da734. 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/FRR642401517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df9cd973827b40ffc9a43a03814eb9fa2a0304b62539df1e28950fa24932768. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRR642401518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b109ffd96d2b550c4f952ab593fed58ff9f1fb7746404da2acf53dd7811dff8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:27:19Z), 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/FRR642401519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1e2f2c9136645f50e1f132a9d53a25a27b34d1af697df54589ba728e60b294. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:19:25Z), 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/FRR642401521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c1e77c3c91376216a43d2fd5951b250f4f272a99d8949e63ade9d5e0123242. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRR642401522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4db70d0afe49b1b5208180a31361df89da249be7b797b50111ddd52dc3ee25. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:15:07Z), 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/FRR642401524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf607f9f8d7332dd58cab0c8debd7dcee162a767168ec0ac7145fe07113feb6d7. 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/FR9W12328439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c33dc95c979be1d8e4cf0150b3c4c98f59a44785f0c9e720312be70cae654d. 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/FR9W12343091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5302435d8717c337525cdb0a720cd5fcf75242af1453374974e0dfe74349017. 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/FR9W12343092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b3fd222581062e6aca419a709796900ca092b7791aa93274c9d20ce4b53f9e. 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/FR9W12343093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8da9c7fd014b5a519f6b738dbb1288789cbdd78086f6d45756405c0cbc115a7. 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/FR9W12343094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38dacec2843155293d545501ad2b4f0a0903e1a7dfae7ef82071a04c3700a6. 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/FR9W12341387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b124e1d23f576a7a4c76581250859c829cf03d0132af463942150b099199f2. 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/FR9W12343095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5907ed21f0ebc50776d011829d028a6194ff5a8a2e8ad6d532b7cff9a4b496. 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/FR9W12343096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc509506151c2b7380ecadb463bda19f4871f6fe6dba039b02f68e2ca247d73a. 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/FR9W12343097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695640098494cbf344655badffa7700c8c5309e392dbc8dd6332e2ad4e529c2f. 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/FR9W12343098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38dacec2843155293d545501ad2b4f0a0903e1a7dfae7ef82071a04c3700a6. 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/FR9W12341387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf607f9f8d7332dd58cab0c8debd7dcee162a767168ec0ac7145fe07113feb6d7. 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/FR9W12328439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f30ca61cd5ca7aee4568f0e250e184f9c4843b088705e21f825b35f03dbf81. 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/QZHN52273238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13a52326e4d7cfb678217e62f21dd16cc68d7e5a6ebf895a65e40cacb6f9bc4. 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/FRU191600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c28a40661fb9b28b43e48db535fda0b9f73a729e3fa5153103ba03dec04d40. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:36Z), 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/QZHN52273239.
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 0x2f8fe950186ae9dea9cce96b077533ac84baa3f2adfd982ce852b8d010ad34b3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR0NT2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773fab0baf13bf8618be3c694f940a02e8f4ffcf546c9da5886fa7daabbe972a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHN52273237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1686ca3a01b793fc0bfdde32fbaee5c4b5e5e0afb2a985b7941558a5086fd4b9. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHN52273240.