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 0x8d46f17aaa5ae22e4d4ecf10e42b1d7f021b6aed6ecba784fe8800b2cf0dbf09. 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/491e57d5-e779-42b9-8012-44d667a90927.json and https://artists.proofprofile.net/proofs/artist/491e57d5-e779-42b9-8012-44d667a90927.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 0xe1da613dd4036ee36fa3513098b9b2ea75be6d1336638695ef3c7f438b7fcfcb. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TR0240600331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115aa84fc6357168f740a4a40ba40af683311a2a8d1b31720fb7a0691aa6a9f. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TR0240600334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ae6b1b878cbb8229b8fe02d8becdada6f68ba241d300bf72f66eb684c5490d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:42:53Z), 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/TR0240600335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8dc22fd542c68d199619c6dc60dc58db823245aa315f248fd3d8bb8540866c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:41:41Z), 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/TR0240600336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438423eda0678787e6ad700f3d2fc8673a74d9b8d12f95abbca58651937f0d0f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:25Z), 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/TR0240600319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b58c888741b48fe7aef44b8dd51d0341a4537eeb31ba3c4af6bec28990a41. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TR0240903419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130b88e5df85db3d45b559e79918b97efc536e56eacc18dc4d3d1b2237d5c30. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TR0240600326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd40ade22d3456e727c74a90d0f46b01d54368913b09a2d0fc37b4603314ddc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:39Z), 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/TR0240600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c43fe00f72ecfd4649573501fc3491b58d9d3547432c98e97e09c7cbe9621. 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/TR0240600309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8f039b85c54376cb7b04ab5cb5b12bf8c2851bfebc62d31d5c966c60783d52. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TR0240600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b9acec366b9d851082ad90524018cac810bade4624f7ed6011fb2630fcbc99. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:18Z), 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/TR0240600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd6ec6ef31b8295ed67c316947fb4bbc82127a07c1d01e6fede2d80dc15461d. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/TR0340900392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af794809cb874a2c7a70dade98562db26401c75a73dd135e6835a1c22fbf3bd. 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/TR0340600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d5bb49588b73e79ef0bacc56f8160372f4d2eaea240c2115db45347dc7f1ed. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/TR0340600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bb0a95699ce155472fb43ba8a9377fc9f87aa8b84af5d48d72ef00bece0d2a. 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/TR4681200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0949140311f6e6166841d06101b3636651a2f03400dd1db249bad487930837d3. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TR4681800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c49ca012ffe8b461fdf36b8405b23492221dad0db553f88b228826433e0ace3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM6P41989872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725a7e01579944434c480ad08539a37020f57b66b7d348fc94f28442d13a3d3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6P41989874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d3877dac9fd5c61fab3b8c1c55d96a54433141827cad45221b2b74d488e03a. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TR9272000491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6517433d4b6047e4aa028bf23a344c2a1e48c75501905d7353eb203c359bb4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TR0410640985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe98764bb9a656c8de53565359e31317c5d9919269a2115838748ae2378291e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:31Z), 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/TR0410640960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa23db8cfc07d456e6fcb35b1f2bf5e2b6281ee7d06216caabeb26aaec36446d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TR0410640973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc18a4a6437b5b27aadacf0b0128d32da2093031b8313197935dd8d05dbe912. 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/TR0410640954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114d81bdab2bcf81491d35f7672746184a842c26993af479dda9da2365be56f5. 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/TR0410640963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcad55b3a49464ae6d839fdc2288e6fb1218245c2146369b12893eee979a1b1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TR0410640955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc167160f76ca4ac535f44d7811f4b06de58dc91cf302853bee3103ffcd8db6c9. 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/TR0410640953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6888eb0208bbd051b2de2ee8236f83de10836c58d62809cb972afbaef2b1854. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TR0410640977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bd1d7e4aa77fe5be434e4ac00baa0120db365c362bf6dfcf501601162a1832. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TR0410640986.