upright=1.25|thumb|The night sky over Slovenia in July upright=1.25|thumb|Cirriform clouds and a quarter Moon in the blue daytime sky over Germany The sky is an unobstructed view upward from the surf
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 0x63909189b6431c3b3c88fb3ad1dbb9de1e8cb871bcbc72df2f9adc4f2513f30e. 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/49f4ab42-659d-4801-9754-5e79c7d3eb2d.json and https://artists.proofprofile.net/proofs/artist/49f4ab42-659d-4801-9754-5e79c7d3eb2d.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 0xe6e5b10b55f9a9ce27433c3624c2224e8fed23ad292ee620ecbed919dfb27833. 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/TCADB1708579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab918e7a723027676f79b73050f82e1fc4c0febf0a22246b6e7193d3d2356e4d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEC1984069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb5d6889a14910baa9c34339ef4e939d349ef769df40b4d6ac38402ec20f5ed. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TCAEI1997558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219c227215c201ee0b1d12a46f75634c15da45c9cd7c0e8fe6ed265131f27f3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR8FB2211400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5186ab22893c0e3f38d3b112dd636b4443b234198fac8beec9e06867eb6a6f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8FB2223120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31034cc2c3f0a393e5e470a9453b12b41b70375fea57cedee5bfa33a64fef053. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR8FB2223140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466cf6a01f3bceab9429ec1d10e8ad13d39137bdaacb68ca3c6074e45f656706. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR8FB2223160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a61cd2045488dd8cf51f576ec71453c6ca370588a295bf42a5326296165c7. 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/FR8FB2223170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a61cd2045488dd8cf51f576ec71453c6ca370588a295bf42a5326296165c7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR8FB2223170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb564e80f3030e98af87ea671853cd3786310d916949da3ddd150fe6d656dabce. 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/BEW012400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe248ff6a2de5bbfd11e402d0cfe839d3835d7dfdc96e35f5cf844904f3b768. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:03Z), 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/AE2DY2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4636d2f10d31b9f9c836d26385e256969e3c60dafaa40d2bf41ddc113ce913. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/AE2DY2500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a84fdcbec71ce01421ce1bac12aaf61de98073947e658e5d3767760272edee. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AE2DY2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37496cce257134794823ff2b53430831f6e328ea67b7aadaa5eb714c7747460c. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/AE2DY2500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305b42e064b38787f9137438bce91be9982a91d861ace532f63bbbe03b5d5d4a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:21Z), 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/FRUM72101787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc1caa258b182d97ecff818c08f338aa2a1fae3632f5b2032d4520a7e30f749. 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/QZNWX2030916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b34ce3e936960fab1673d0595bf0f9e583600ddbf4cac55aa14730da369e769. 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/NLV6L2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dadf9dfc70c08c8c2d44efa956d59fba5ea6a23209eed25f8588e914a243cba. 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/FR10S2235367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ea58f59b3c9828a3200b698e09a83069e42bfaaab47ece56c5646d1e283efe. 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/TCAHM2349160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0145c900085c68830034235cbdc26003f0b1154b3e20bcd7d2758653f616407. 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/NLV6L2000076.