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 0xf0eaf6a47e63a93fc7584901c6b71fc1605a64802b32a9b51c4a3de4909f8356. 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/a769588d-6d9f-407e-868a-891bb55ef3b4.json and https://artists.proofprofile.net/proofs/artist/a769588d-6d9f-407e-868a-891bb55ef3b4.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 0x4cfd801a41ab54e7ac20a3b3c5c7245a244b2a26da43b32eece53872005b9fc9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2442267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ccc0ee1f581f2c102592742016f86f87fcb00996471a5abc09e3321277c1b4. 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/QZNJW2424351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2b511367c7fcad1d0b0a26441b8cc0d02db301178074b85f2ab814b2f4bad6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJW2424347.
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 0x0001ccd331c5aa2172fc55a6760352c4c1cf3f18d11aa78b2a32878fbd3d1fa5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNJW2424348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462ad2c5718a41671aa2174fa79aad8c77eb1469faab09901d140649a1249477. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJW2424349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf544fe1239c3756091b2818709ea584cd7a90bf11e6e0309934fab597b2c2c0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNJW2424350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8fc47af536480b9ddfe43b4f50e0afc67930dc742b0aa1887fb424b07e0ed0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:38Z), 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/QZW9L2467397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c589cc6f74f697a08b1c99567ca2210628474c370a61a12555d2b9775ffc8e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:03:31Z), 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/GXBAV2595359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77828b07c4c80e664e4210b0544644ccff55f00be8481ae2fa02fe348fc707c2. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/US7VG2577596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e7215269d505030b94504ede29c853cf12dd8777e5103dedbb8685ea7a5983. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BK7VG2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c338ff79506892d0e7fbfc830bbb04614a00f3d17111dd7d26be4170131b50. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZGLS2505937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e514818552bbbc5f19935bb5931870276aabe912d9b418964d25f5b2453e0ea. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:27Z), 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/GXD7G2557717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d351e108ec46c4f0154ae13375122d369b1175d261c82cbce99498c9cb855c. 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/SGW502566686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa7748d18d2f8a09a17c129eb25528e0c385324902e41964401daf1ccf6e138. 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/AEA3A2552475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bc7259052878c1725a0a9313023d6ea8b06ce1a23162f8d3386c851e6b1f36. 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/AEA3A2118214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9e4814f6e011d12700dc1eeabba6dbcf82e27dad36e217cee7718d12dc6d7b. 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/AEA3A2162269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6296fe5d16708d423b7adfda9dbc0da6629252002c56b988c503e48ed65e75. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCVK92502023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b2d08af90d3e142d799c35e95a2400938a749688f8ce12917c5a37453121a. 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/BCVK92502294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6508b1016071cafc29df1f8266479f73d92030e37e0a401bf24d8c4914680b88. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC9112400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d7a83657602568659734af5d995ef48c930d7961ee30b1b00465a92580cae2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BC3PG2401305.