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 0xfd7162f1e7ca6b174ce8d171d0505e7f80bb2f9e91d3568aa90dff0927d64e26. 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/1f3d6a67-42e1-45bd-8277-63c0b828aa5b.json and https://artists.proofprofile.net/proofs/artist/1f3d6a67-42e1-45bd-8277-63c0b828aa5b.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 0x97fd4bacdbab85ea40865db9828975a066c87bf3146645450f502ca41a6193b6. 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/NLW2R1705996.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ebbd198e95ced92ae786a946017293eb73cd51f0d126ad1b46b447d2c9de98. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:51Z), 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/NLQ271900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cdd532912cdf4f41310e21937a598a6489399a90db9eac83096a58b32ccab7. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/NLQ271900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5d2dee4c600177436ba1b13690137a42ed7ed0491cfba8734b25e9229edbec. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/NLQ271800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c28a4e5dde8e99a9a0a9d3c654828aa7a3a6140c5e4998a52425e5cb76f9f1. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NLQ272000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab6eec80337b8cab96b1ea1f0c55a8eb35ac56c6fb020430a99568288e707e6. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/NLQ272100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced76c936684e15e40a7ee992c389ea41c900a0c2a79d16459664d3d9ea9604e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLE872202501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced76c936684e15e40a7ee992c389ea41c900a0c2a79d16459664d3d9ea9604e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLE872202501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5eaeb87133c9a96b16a6eec0d4c3c6ac92ded1526755138cc17ef1c82f6906. 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/NLE872217001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49c91833d52d56e7ff3898c45ced9cd566421a184dd60a573b59e373050e23. 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/NLE872300901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3de035a5745153310ab5b9917bd76b856dc086ef389da9ce27702c909cc4b8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:11Z), 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/NLE872305601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e43e97bb7a7447c2ea26f5d85c76d49c0bd45f37bf18e361ddb38c1aa50e5b8. 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/NLE872421901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2fbfc2900a54f231cead54f45132e2a946c7edf8584aecc368594e0cf6e47b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLE872424503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3de035a5745153310ab5b9917bd76b856dc086ef389da9ce27702c909cc4b8. 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/NLE872305601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2131f569a4cff0d876f8111a8d8cebb885d9613c4b74814518497c16e6ec8a2. 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/NLE872424504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15311111a59ae7f5d5a8913869959e9b242111bb90505b80167a2d08a9c3e4c1. 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/NLE872424505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83ff4adc244ff61fe298935bdfadb01808a31c4cb6be19b808e143be9a393fd. 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/NLE872415201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8feb825a53d2ba8d22e66d9c75f81a85a33bb050922dad9be0f4bc8d0b3bc2d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLE872424506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf008727a4a7b2ee9719bd987aa8a45f26f969d66ffb0fb64f73af966c4e8ecd2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLE872424508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dc17a6a4d1dabd0a03aa28e381034d3e38c5e07c8aaa348d203550067ca509. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLE872424509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49c91833d52d56e7ff3898c45ced9cd566421a184dd60a573b59e373050e23. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:46Z), 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/NLE872300901.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0342cf211f7228b22b2bed10e3ef42b1455bc76c2f9f62ce38498b0c705cbd. 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/NLE872310101.