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 0x3a13453711d85d6e90d9dcdfe9ee67ab1bc239666734cdb43ba25f50a4b63c09. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/999dc938-6aa8-47eb-99c1-72a6fb64842e.json and https://artists.proofprofile.net/proofs/artist/999dc938-6aa8-47eb-99c1-72a6fb64842e.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 0x1a225e2d7bf6714a8173192308e95b2558303040c0afb7d94f26b67fb6ec7892. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ROUM72300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554bd85fe5a5ce3b12c077951c1c4111d2c7ac4c70bd736ae8a0c48894b22c22. 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/ROUM72300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56232af77eee6488a9c28442e466af7423e0c3825776d01a65407ae26694464a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ROUM72300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229c7fe4b078314463c0636ccb8b945c63c0fbed4c31bda6892b1c522ccf261f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ROUM72300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3bc4247b161b21d2746bc9e824ac98696eae395e32cfe36260aabb7f5232da. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ROUM72300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d83b1406338132990c5e4cd1ce1e2f41e8345550e5dd8e6610e300766200d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ROUM72300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b123c50f78e71e5baa1bab7c131ae9ecc55748277acded92f0c40bd98da823b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ROUM72300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a07195386f3ec29f25ef9b47f8e1481cafa7a1d58b7168ba4ad80de6c457d9e. 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/ROUM72300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d228f2cfe1a3a7db04ec5874fcebc4098c4e49a71075d7188e5498fe7f7fc65. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ROUM72300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb43bf2a19cf8561b22b76844ef0692b82dd715db41c97346eeeaa4d12a73793. 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/ROUM72300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7399c2f949cdbb3b91a2913ddd054c25718b2c1d6357c509d2324e9aef7f73e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ROUM72400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795942ea8cd9af8c53dbda268735e1e0931ae4982e5ab2dd9294efe49c93da5a. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ROUM72400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6248c2226edaa2f4d4aecde3431d83ffbe5f377fc168c9a8ce97fa67b9fda108. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ROUM72500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4614f67287e38845c8f4249d05eddb3a6ed365b0774d3d70c30ef5dbbde579a9. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ROUM72500179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4614f67287e38845c8f4249d05eddb3a6ed365b0774d3d70c30ef5dbbde579a9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ROUM72500179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d1c4b8e780de315aa1de354657ae5ad37b57a791792ca817208a22ef25c834. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ROUM72500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6248c2226edaa2f4d4aecde3431d83ffbe5f377fc168c9a8ce97fa67b9fda108. 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/ROUM72500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f582ff9c1e57566c868b17396b841b5536d9cf196089ca01bbfa11188a56d2. 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/ROUM72500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554bd85fe5a5ce3b12c077951c1c4111d2c7ac4c70bd736ae8a0c48894b22c22. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ROUM72300072.