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 0x77934d61a5704e8a6b8765fcce233b0ea57938ded93f7ca0afe327b6228cd0d0. 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/ea37bb23-eeec-4e17-a03d-7f0ed94670aa.json and https://artists.proofprofile.net/proofs/artist/ea37bb23-eeec-4e17-a03d-7f0ed94670aa.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 0x73e37d187f2b6f43bd78869776ac4f62b153dd9565602a65b0ac1a2ccdfcbe24. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBSMU8009452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaee23d0dbf144f3c7030a641d05e7b406f8d9b5ab2a1b4fae8fd26d2897ec70. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:55:27Z), 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/ZA82Y2100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3363092802dd83bcfd047fedd3ca49037e50bf0cddca814f6a8d64bf36fbaba. 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/GX8KD2224116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d1a254185a73b75ab87d7d7017fbcf35fcaaf5052c2019253ab8889347d1a2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:01Z), 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/GX8KD2258087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3322a6b997d702db70546e699b1db865f916942b578a41a95d11cefab11171. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/GX8LE2390501.
uMalume (feat. DJ 9.8 SA, Laanoss, Ceekay Musiq)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1942708b7ec7b87a370cb2472658e4cb24a83da7be75419c2f756c7975432765. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GX8LE2322888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0770114c4084cbc7cf976b3e312aed275062f92cfcf8b0666da23f8fdbceacf7. 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/GX8KD2425612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa92a24581bcd0b80ec2188f20ce8ea255b0aaa83ce39cbca5d3af8d7f9e7a9. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GX8KD2455732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aea00e10d3ead6ca6303d12c3cc2d9096ad71d9e3d1f6cf96fd18cc861a979. 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/GX3HH2483348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd1be11e941ac93a7a9f7b056ef0fa90eb1f422ea9e04c932fe4403e2570b58. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:04:33Z), 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/GX4R52406975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adf709e1c9f2fe3371e5b1ebefc3c885a9487ef80c910f676081073f4752718. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GX5MY2458007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680d53729746dd4ae0db76bd02d0dfd65777abb9a3373d53227705bea761e91d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:28Z), 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/GX8LE2564021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18a5d90cf5f60771da7210a5f50284a88b6863ebb63c441898d7fe59cd9b5c2. 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/GXBDT2579495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c1953247a5930b5fd5775c341f22427a20d08029508103067c1c8f47f70c1f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/GXBDT2593416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e332b007316fbdb6360775fd76798faefd52ba400efb5b34c274e7bd8df42b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GXBDT2504787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831e8a3b6c51dc3bbc7fbbfa563e377810cb288b52e47c1a39f21f864498b3ae. 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/GXBDT2574180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1e9fc9fbecd1129fbed98c55ec56f56eb4c0458dfd4bfe48fbb700d422748a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:16:20Z), 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/GXBDT2584362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11a99874884d57864b21739f318dee7380d60d9620ff97a310e4b33ec0d90de. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:15Z), 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/GXF972570545.