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 0x24e87c2a9bd589ab8f378f8a6a39c2acbfbc71358e14977ebc85b705f7a666e8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5417d25-9927-469e-85d0-1688628751df.json and https://artists.proofprofile.net/proofs/artist/e5417d25-9927-469e-85d0-1688628751df.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 0x9326c403c1acb1318dd718eb6d150041f8028bf89b9893de8af1ee830b1856a5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/PECR22401866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1ee1f86f451a6f2944da664be1366b2e5c61cc3c889ef209890f0302120af. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/PECR22401872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e7d0583453a5ca9f34b325a91c04164e51e1b0f2e55af271a3ce40b47e86f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PECR22401873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0af03634bdc0fc361b84541e8642da5e56aaeb00cab6015a54891c18ca892ca. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/PECR22401874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b8116e7e0e0afa7f37d42c87f3305705178dd6a3729bc00132963d63db365. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/PECR22401876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c3985d88b5dfe12638799acc7c3d5f9295ab060a1cdb90161137b3b0a41af7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/PECR22401878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e4cd821b5432b2c6fbba62ad72687a83513ee9dad8f80d532aa778ea0b9b4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PECR22401879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62246546ed8240ae79cf095a40e8c7c8d0709de7323bd82a120003954821dde8. 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/PECR22401880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8c294daea4423ce002e5c0b4c126b50630ed2e49c65f2209b5e6a656e3868. 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/PECR22401881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e1e4575b816eaf9f640ff1b7d752ac0f1433dbe8163d0eb330bdb07b730302. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/PECR22401882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9ab06c58a1945fb5506a90c52271158cc11fba7f24b231da82ea1d99bf71e2. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/PECR22402004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a7c1cfbd2e3a8c1111cfb8431c3e2dc1797ff3b5cffb663d23f26ee9118fb5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/PECR22402005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf838456ed0114a6e7d74dbadb1b94c89ee7ee202f4effd33e65640914bf3559. 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/PECR22402006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96ec11c696324715222375c34e73f55ca27c82f66c13d5babe8386910e78053. 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/PECR22402007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4120202910d33f1bc9b0181d3ef48c8ae69390714ce98b43d3f65d9710864b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/PECR22402008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6770c7e418529fc777490c26ba10ab2f920d02146a54d4f69ad98a8bfee682. 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/PECR22402010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f821b6356abaff74e89b2262717bfc51c16c2e2d31227f6990e28d7689f2333. 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/PECR22402011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcff1d2a9137400149affde9e9904eaec9328e30f8681c8b62f7596e74391717. 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/PECR22402012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79eb46e77e8ac507d5ed4ff02a9b38769a6728080de38d207514efca3c0eb3cc. 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/PECR22402013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa6260fb23768faeedc837832a97a736a1a6e0283f164da830d02bb856e54f. 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/PECR22501246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21933c090dabbc6d7b66596b5831d202d2d4b8599304f71e38d02652d586dd02. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/PECR22501329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216c5b7cb9a26a526fdce7bf7c5e4a831d221159e88bc4439aea8b37954b26ed. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/PECR22501710.