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 0xe75707089c9e551b120688ba55cc667b415ab36f921ff2eb297fda4a320b2d27. 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/d1338253-eccb-4f27-b8d0-2441bd80894e.json and https://artists.proofprofile.net/proofs/artist/d1338253-eccb-4f27-b8d0-2441bd80894e.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 0xef0bce644b7ab4daa00743042652bf1ae87888cf5dc321a9bae537946d562790. 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/GBKPL1811819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0685f779ef5489408685eeebc9f5098fc516e562e27f0319c9be8c7a1d8eaf6a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMPKX1822727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139e7fd184d60622f5879520c8aa2b92cf66d322c9841f7e50b22304a4344eee. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QM2PV1828527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed289af2cc457bb14ad07c8bdfee680e218ff57e2d9f4a904493a12b7b08f53. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCADA1783952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0178cb42b12dda261743f59af749c75d689569c23db8a8e28b7b57c128edd27. 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/QM2PV1828529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf43ddd770ce2b9deb2a5a22fde0ebc06f5e5f0f2b2f3967278ca5aa99edeb93. 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/QZDA81833872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcf60c37bb70a57427e9d0b3151490e5435827390eb0f933d9f062427b82647. 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/QM6MZ1985381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8930765f88fdd1f7ab99603c74ccd44b309fabf1f9873f1e64b80553d3dfe3a6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6MZ1985382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c2b65f409429161a1fe479dad1d0b704f0d0f300669645a3b54fdafb83cce. 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/QM6MZ1985384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b93a8342e222e709947fe01e9a37fbd003ae974f6248b2a7e8a05135e0243f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QM6MZ1985385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99886ec18fd7d1d6331f9b7490ad383b207c37481caa8d7ea2736221ecd1d3c1. 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/QZDA71955820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b58308541cfbc3eb1d8b297dd8f8c0c11e7bbf4ec0217cd950b846a6f1b036. 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/QM6MZ1985387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4591e70c26a5143d31e3a331bf226cc0a41fb353e84ee64b207c7744504d7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QM6MZ1985388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f5926c3370c902dd77d4e3dae0bf6a161cddf5012982635dc4a3c90d32bd9. 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/QZJG51955991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6065e102370326df5e01007f3680fe4fcc06f84c3be25c0560ec3807f46375. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZFYY2070992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f959237cffabcc34c2a0c93d384ccac32bc7f2966a9ea3383725eccb34b48a9. 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/QM24S2009761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804614fd0186cb7112acb5acbe04d7f9273e8f9998bb977e336c625f6df00bd3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QM24S2100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51fdc292f97a9544cc6ad545a3a51066bbe961e57953aed0f23dc131a318b69. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLM2139737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2dabee5bb6e5ec2006cf3c0ee209f82cec014b30109c8a7e582916f7f5913b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:31Z), 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/QM24S2304936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd290358f1f2c53e5bec1517bb1c0bd2a9aab3359809360682ac03754dfcaa9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZVEM2394507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe094eb8ab28d6503a75c80d762423f2f254538bd2549d5c91e9aedc076f9de8a. 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/USRC12002318.