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 0x19689b86fa9d02dad67b301c40ff863f8424dc80ba75ed4999ad650e73861e96. 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/54c0c3f2-09e7-46f0-b610-551199bc1c35.json and https://artists.proofprofile.net/proofs/artist/54c0c3f2-09e7-46f0-b610-551199bc1c35.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 0x97bc7cd9453d78a32cb0d97b5a73e7b683f452d60e7a64498d123aca15b5098d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX191000581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16b5459206f4d23fbd6254c4a20509c30a30f4ce54c638d6d0671001bc10155. 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/FRX191000582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7e34e52d4abba02292290d5313597f1f047bfdf9c909612be74f2032047434. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX191000583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c934cb9217ca6ceaaee0a837eeac12b66e42180a645f03f7829d33e8bc1cc. 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/FRX191000584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4766af5fd7d337c741a9a32c9bda85e86fad19113397f5b7248a7c6e48292. 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/FRX191000585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40986f41cd47b1549fd15e4fbd3861839caa06392839eb969b5b74af6620356c. 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/FRX191000586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bf126122c55802f92cda0cf3566f8ba4437a40140f2b19ac99108f78d7ad14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX191000588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6c1876fabdcfc43ddaa146601c63a6d6315859dcd182c6b06ef1c2a6b3b5b. 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/FRX191000592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cad9e0efe0d45b032350d24cca461b0c8b54dff0e2c76bc08a2d683b3f721a. 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/FRX191000593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5937409346bb55cd5104f1b8e3fb2500ec9308175a31eeb91ac57ca645c289f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX191000594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c616ec9fd46253e2aa84d0130af4bd30d603b0222515ad927efe980c76ef1d. 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/FRX191000595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679c29896926c4f53f7a0a439bd03c82f450a9b363eee8a385823d4d436171f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX191000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2684b1bed2c40f7d1fadaec85a956845d7ef8ba777e043ab405dcc2c3dc70. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX191000587.
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 0xda8a9f38dd90425da4819d83a2e8d62991bdea1ea2729d50153e9d11e9c81735. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX191000589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa183d7f92de9e31e8960b4930d8e4ef2e97ee8504e4d0657d7a4c17f8c4a0cb5. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FRX191000590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f3ef8dcf879d67cb43d0046879eb1a6f7115c8f51c60738e34af9dd7ca296. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX191000591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0bc6a56556a5a42a5f4c6605187c2fc96ceea33fe1413ed9ab66cce98146eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX190902165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0ff88f0e8b5bf3238759896656ceebbc5152bbabfd3a0e5d185176ff28d30b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX190902166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b2b5b5c3ed863e331d82c298c7b88f566fed4483d4bf3c9be3bf749460ff59. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX190902167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8139077b2af431780f9bb21412ad69b332c060950fd47ed0e18c88bfb8ca9c74. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX190902168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e61ef3b5e65fde2aa72737b7e3e0b5f86f88e57a37f7651d387cf4c5e95ec82. 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/FRX190902169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b36e21aeb75355952d55945098771a6be721bafaa1c43ebea0077f952922b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX190902170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a56f3a2a80f88811fc27fab5be69b0cbdce0fb678e2cd9cc7a94626cf7512bf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRX190902171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aa1a8c2afa64b4be928f524d77ac13a0b7238a521c30b90dc5f8acd457e683. 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/FRX190902172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aba291c2c6cb8e4c32db3af52a81e40a5b7e1bf8f64f02859980b78e865ebe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX190902173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037d26a045c5d120cbf9e8e62b658a2995480992823664d4da794cc1669c7dfa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX190902174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a403ba2318ffe543fdac913f69e0267ee0dd2fd38beeac4a5a96f438c1686a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX190902175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde01a3c8d1d92041162dd0eb1c3833e5b089d5d8470bbf39701223db64260e4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX190902176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a127c79cf670d014aa9d2e4b709cb9dedfd4047e90b72a85eeba53c3241bf9b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX190902177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a97da1b5bb9fc634fa060fe7bea2eda0f318a35733fa1c145589d56d3d76146. 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/FRX190902178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18a23bf1d7c2de80f70ced4a7dde8c7fd75b5a363b06d6512bfa63986bb0361. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX190902179.