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 0x7c8f3b2584af0fa81d7dcf07b60cc81d624b3b1aada30cfbf7b883de990b0a1d. 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/812cbb37-ba51-46e5-812d-ebe46ea0069f.json and https://artists.proofprofile.net/proofs/artist/812cbb37-ba51-46e5-812d-ebe46ea0069f.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 0x5b0ea33ab102713ff690ab57d82f8801e5015f701b53001414bf82c067887340. 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/USA2P2027878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f055ead1a88d3c07bcda7ab09ac16a068324a285b14cb6d3e95f728972534a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2027990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1f7d92b6f439b228389302cb13f193a627c581009dd275ceaeeee313998d84. 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/USA2P2028290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55743907acb2fad59bf2cade2bd79de1b7105db7a6717b47f97b8a7f604bc19. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USA2P2027995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5d2b6f124f54f66c30052ba6855cdfd592547ef3bbe17794005badf6158a70. 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/USA2P2027421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e7b4cf8f51f88e37aa193057bc06e22c23a74ae06d7d772bb5bdab9b72692. 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/USA2P2029060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f289e3e61aafe13945b8433a069e0f90d045250807d493c0b9fdfefca17c79. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USA2P2029062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad899268ef1dae19668ccf170039b8c5c796ec7092ecf036b59817f230f6e226. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2029065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc511a37e9336c93e42cca1619a931afbad2d2eb63ed2cd8b87d83d96abec8bbb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USA2P2029066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed9abdb8b6b9710de2f19baf4d8519812bf60a20177f510f2aef26f1a790ecf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2028626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64937badf792abfe498e0cc99ce3864cb08aa7a2090a49c81208e9bc44949208. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P2028009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739650f2da60442cb0687007aa5dc022c624b4b2df2df2ae7823be9b3e824e66. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USA2P2028194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117dc2d4909fea9f2532c9dbe8a28e4c5d2aa333635ce20607e48fbd43cac0db. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USA2P2028195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d540fd05b1fc166585a5a34eebc0ed153582d109ddcfa414b182b11a54dc1d. 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/USA2P2028196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabbb3cf7c05265c8fc8894e608498269659c38504ac940a0a83507ddff8fe84. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USA2P2027834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a567b2f990d2b4b158f39631aff0f0b492a5b619fd5eee9a12c466ebb179e6d. 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/USA2P2027837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a785fe03ee86db205c9341e2df2cdb667ed2a5c03f6b19c30a52c483885306. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USA2P2027838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b887d50a214d553313bab39938832c753f9452463f3610286dbbc812bdecf5. 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/USA2P2027840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc075c4cf44cc83ca0fe4f0dd8a76c73a7eb74393b53b9bbcf6c4fb2211dedb2c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USA2P2027843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32473472b307184ff8548a4a9c4c49f21df3e9a6221c60d023de1308d81b425b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USA2P2027844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716eb2185f59b28159b31884394f909678e7f527883ea630e9fa89e37db1151a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USA2P2027851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a30907231a12592bf29f36a5c34e4faaaef5f225388e4307a11d6792231ee09. 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/USA2P2028198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca629f51b66fb621a5b93d0209ddfcaab7c47a385ac4ff33352e30131ded678. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA2P2028199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028ddb831a0394f19b0836e900f714c4a939f8ef592ae6784ffee1110030cbca. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USA2P2028200.