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 0xd2aa6b442f9998f0348d44790861448508755056805ad62758b87a43948eed28. 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/89a5b447-994b-45da-acc7-f21296e5611b.json and https://artists.proofprofile.net/proofs/artist/89a5b447-994b-45da-acc7-f21296e5611b.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 0xd7510b55a008dfba4928deee5af0073f64f25151cec4a1f1fec88c1ccf4580ee. 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/FR4Q71300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260502df54548a50816298a671076ba0308ec0967fe7e26f3f9cf429d925df45. 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/FR4Q71300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1863d4730aaf28711a4aebfede484bfc03abed6b7d93dc4679f4f9836d94c35. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR4Q71300003.
L'extraordinaire numéro de zouille le magicien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f236b11cb6d32e42c6cd2d84c9bc72a2c8df4b2a0cc1b9d0bb238c2f010b78. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR4Q71300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bc199e061f11f54a92f28d3c14066b843264083adf0c875e737a8179317445. 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/FR4Q71300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb84c2c38f429f65fd4743c223aed7f588c96c61b51693b4343c8b066fb787f. 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/FR4Q71300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bae91cddb6afce5453190d3425cb30f37ba4f37dda1ecf7e08b660282d3a9f. 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/FR4Q71300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f9b0510a106a0104a294cec2675518e6b0b24561872888774e113f63d1a66e. 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/FR4Q71300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6942abaef6a24e3f435cd5a295137a2e4164298cbadb7be467d0a151cfc76bbe. 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/FR4Q71300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35499320fb56eb476e64960d6988586b585e79840c6da20726d50f2469e4a9a6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR4Q71300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a4ed890d2e5e4a9baaef3b8ae9aa587babb3ebf41b6b223934312325937ef8. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR4Q71300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf81485f07150f516e262ef0c606cd8f3b5d4b762eb94a9e63336a0967b7146. 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/FR4Q71300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1724a341a4b170de52819c005bd5997a316bd385769ce3094edc0d5a4ce8322. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR4Q71300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be4079f290676754adeadcef137a83e0f0058e01ae066ba36a04376795c0f81. 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/FR4Q71300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bae6f157db4a45001802ac36ec383749ddcda12cd942e01e1c756d62a544caf. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR4Q71300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226df0236d1527e858214ff1a8eeda44b254c9a9f3a4dffdfb3cf44494fba524. 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/FR4Q71300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49d5ef7b5f04e3f885e677ec2443d31233de053120bea8dbb738e1f16408752. 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/FR4Q72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0aaac872c9633bff1a02df2839c32fed89839986861e287ea9ed2eddc01aec. 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/FR4Q72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5477207e6f1a0ea925e3ed89aaf302a2ea0a318a7755c087ac378817efbc9de3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR4Q72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb5316f6f4455cef1b34af823645607fce9504212ca5cafba20849fbb7b020. 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/FR4Q72100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a97be36179be4e1718bf461fa28a3d89f06cdeafbd75df1302503d2a94a705. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR4Q72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc3c08316c1965c8e6d2b6e8ee8f35947d02d6480e007e477852cb168b7c1d1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR4Q72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b79fb68723e754b8a44ba891c5eb21532d0cb2eabe12cd81b5c18d7c44f4dc6. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR4Q72100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d92dac9954b9e5b1f9ad2e4a8738fbcfd4f0422baddae5929a669ec4208969. 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/FR4Q72100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7ee3089202a214406419a539f5f4ef8e868a6aadccee10a41e6a4eb8cf322f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR4Q72100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe149e553ac42fb9ff5c5795235aada9d7a993f9109f6985beb6e2596a2a17416. 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/FR4Q72100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf180ad414b1c3892e4e52fcd01f5300a73a75ee6a70fa758f03b3781f867cf39. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR4Q72100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34cc1c66354952161781b6514d4d01462c0264901dff98e6ccbd3dad9034782. 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/FR4Q72100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2495bdf581da28d27109c1e8db0286986c1a1a3b44e98c886de42491565b9dca. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR4Q72100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8e20641e6afb3de0c40c6efa1cf9d7aa1fe41db0d14d76a56eb2f60f0d8edc. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FR4Q72100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa17785700c82e10eb4eb58e7ea041cdfb6fae597d0bd02f18632fa2f515b163. 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/FR4Q72100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dba91794466a9754757c221de54e835a96dc17f79ba7b7c8ebdaebe0546347. 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/FR4Q72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d67f21c37be6bf0984a82e32223c3dbe80492cd587fa2f192021e103ab22e5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR4Q72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb268a0ff82497bc69d9d2e136e71a394e04d5d4090f2c6d85973b372a040ca4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR4Q72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe467d43cd3f81a6aec6b92b6f4d2f8433dd103bca8ee6102f0fffee65eb48c40. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR4Q72400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795096568bf8c8dc46ea82b5bb43bb68e0ff7b25ac48170de372730630cb3c71. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR4Q70900056.