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 0xaec05feadd21b020d6cc618f52d609de9065601a3ca85b87bf2ceb86a683ab36. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af821fd3-b341-4bc8-8773-90576bcf62f2.json and https://artists.proofprofile.net/proofs/artist/af821fd3-b341-4bc8-8773-90576bcf62f2.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 0x1d1a102085d2ffefd461b6417471a2760e7055a7e49785f490b84720a71a1c13. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/JPB601652242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ba7410f7fd1ba4716db9bfb57f34b58b29155e0c3305708cdf64890d68f15f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/JPB601652243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0341e88c29ab42cb9e95b1417d065647a54e26ffa19114aeec499f3111a1ef1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPB601652244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50459e8661ea2b3aee51b825964cabd8eea301c2494542e111e9c26497c92fad. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPB601652245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3448efcae0f8733fbb80c4506fdb88fd8316a6c7305681efbf926fd18c4be2bd. 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/JPB601652246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0a8200e6fd023e22c58eee6e1e98ad5fccdedccf0a6d8b29cc9c790deecf50. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPB601652247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4ac967d9b0a1ed37f198f3b0d7c0fa4684bb24a19beb0b1e2c226358ddb44c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/JPB601652248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ecd4d7c5c431cf1df89ebec3c7bf1153b886512b7ec7646297974f535c72b7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPB601652249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bca373e7cdf8e1adcfc887d4261ab0bbb0d42ec440afe3d900f5e139af727c. 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/JPB601652250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd1219415949fe94b7919fe40dd908e59104f8b9e3dbf667986f0bae143226f. 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/JPB601652251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d4844e04be61fe8b8e09dd9e340b28e8d3d689e2346c52bbd847e5ff11c2db. 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/JPB601652252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc9fe968b64b264ad46334c21bcd3d62fc854ea485631343fd8ea9641b581f2. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/JPB601652253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6810a5ef7ba3dadcdda79a9b068da3b612d0cf775d4185384818e44ec1b91f. 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/JPB601652254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf308d358c8dce18518040cae6aa94f5316cd76582c2ccb44fa6bf5623a44b836. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPB601652255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c07f127e698bf1a261fddf397dc831e4525747529adc89840ba96f7120e45d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPB601652256.