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 0x7dd6ece96c73c3ae498bed136f9a077f8421091fce0379538dbc29b4323f95d4. 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/89408c24-2fce-4905-a1a8-a61ba9e9e7b9.json and https://artists.proofprofile.net/proofs/artist/89408c24-2fce-4905-a1a8-a61ba9e9e7b9.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 0x44dc54d845446bed7e0cb1e0cd55f103966b1f17dc78b27255e0cdc3c5d5e52f. 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/QM42K1740360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4cc5321f9f3a8586c99092899478f778e8bad4a156f8ef192b474593561e2a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU8743238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f26b7b3712f1d6f335118ac252c7c0c24e3e64740b3bd8d5a3babd2ea1d432. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:57:32Z), 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/GBRKQ2110352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c415f1b8282e2d5567850761fce920daf24fb2915a42d8753234a2a327b470. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:29:44Z), 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/GX3HH2195567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32be3b31a8c5c463a23ca68822fb64f81b77e2ec8f1571283abb7756891ae0e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM3DF2140678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ceb013fe5c1ea99b7b8787f8586301ff53ba793776eaaefc1df124047abd5b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM3DF2148110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c347f4a743cf391a0a2b74a9932f2203a8b1baf4bd9c04a886b99d9de7a2de. 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/QM3DF2148111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba26a235899503e964755d576a16c3b753135a5c09b4ffe51d94ef605f01eae. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM3DF2161535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f517528a7277cbdcfbcc4d78dc69c254f7c5393d543c82b9e733029b19e44e. 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/US3DF2238276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ae73b1fc8c869e79bec1f10b49568b0c64e1b59dd6ffbf5b3753616e026cbb. 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/US3DF2270549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da3c5b5a1472fda4e8735061311ac9630e099d34ed1dd4e17175ef3ce0b3d2c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USANG2243923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd153cf8ca36ffd90399585d7fd38b45bde0a4518b74eb47cf9a792443591dbf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUAEX2304854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa0bd7bcf17013177fb2e477a542a6b23bd01b6f627f1c35ff1212253a38227. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM3DF2203811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc10a1221497ec2cd825aab6861f62fb77adeca2475c4e7cbd23d758d4deabb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AEA2Z2304301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed3f66d1fab3db63063be27e3719538a9939b2d4ade0419f472c1c9a3f218b2. 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/QM3DF2246908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe309242844eb6dd459cf5473e539c9692deee21619ecc8809ff8a42e309d2bd3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2246913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f0b5bc066bfcde278867d5fa39ea43f3de4ae8c9654105c3090be05945e5fc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:43Z), 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/QM3DF2246915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ed521bcd2db78c196528d31573b46ad0e901f941416a5ff4e20f466df3759f. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QM3DF2269666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919d98c40004d7eb6b1a5ca6b42dd2ae72e44406641fbe927785b6faaca63765. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMANG2200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8c74479a52c6d9ad8460f142042d1325d454eb7e59d0334d8c2adcdb924966. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:47Z), 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/QMANG2200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2455858d0ed02cefe7825c135f0eef282829fbb89e0b27ee86194947a0945472. 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/QMANG2200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46028c115e560ca85caaba89b266777f3309f7c5e89342f70629896ed751fa0b. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QMANG2200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8d1562b5db215f0c1cf18b642b81a55457a791104508b6b6dd5664f1d703f5. 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/QMANG2204417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ea16668bc326ecfdb827f07b40956f2ceccf4a5643458582e856139d9fa27a. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QMANG2221255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafcb7c075b58938f3a6801c11dcac22eb021ab285bde7c6495a16e01336a8e8. 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/QMANG2248534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08875ebe08848b6135f96b5038967c5fa6ad34f262a91dbdd0fdcbad9e181fc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMANG2248541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187c54b2cf213b0065bc1c21a5a87d0e4346f87451748c7a92db4ee7305e2484. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMANG2248550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cd4b9139893174e9f51a8ed6e42db8287d28ceda6299939bbda2b3d025f365. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:01:56Z), 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/QMANG2248554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fbcd98efdfecfc897f3b902886f69208e6368ba1d36c81f88389bc262fc250. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMANG2248557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95cac2805781e61e74f510ee9b7e4b0091cb79436c09a4a6f4fdf92efab5942. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/US3DF2567239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593b780a06a8041d426b3d04524d367d3c9f6fc524188791ec071fd87a03b21d. 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/GB2LD2110373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14362fcf2be78b3df110ed9b11ec79600c4de7d5f214f1994d92b7a601009e70. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GBSMU9126691.
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 0x859be1074b139dcd2d0d5e5f121df90f6a3dc7bb86d74ea03cd2e39164bce307. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/PLH181600680.