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 0x24b0f098a5f6fdffbb3a968339b0797648385f5d1657a05863c629560b671cc4. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53d79671-dbae-4647-9b4c-30c6ef2131af.json and https://artists.proofprofile.net/proofs/artist/53d79671-dbae-4647-9b4c-30c6ef2131af.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 0xb4c2a75ae294e432cba26c1a0340ad33c13e88d51df99560bc56f170fa1c4d8a. 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/FRZ519700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c43cf1c50780e583f991cfed3abd624dce345fd8f6b42e129238a18eb4062b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ519700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8ee1c52d918dd2c4f28b18fba7ef20dc0713f18ed2daf641a9947eff8bb541. 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/FRZ510000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b35892ac2c204bf4ce18a55d998d57a9d8425e85c6c8fda8f2f1dc8ca07414. 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/FRZ510000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42192e65ea75e91d396602dafd485450759832051f4e481e7011126200856042. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ519900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3577a77f1d8f7319e83ab98e95533cfae278863fb04e8e66a12342fdf2ac586. 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/FRZ510000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3976384aef945a71a8fb25e9f1303cfae47b0b3e22e51ef1bca6815f530cec5a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRZ510000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de9aa702af11c0794c3f1ffbbbd20dfb77e5aef8c8c14e87967a8d1076a80ac. 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/FRZ510000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b3191c4f41cf21e2bedba877bd53fe708c5c6c64d3abbc83919c92e534700. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRZ510000294.
Les gars de l'Aviron - Pamplonica valiente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442cab2c0b49693c8ede2848955fd76b66c9b0e4b3e9686d324aa84ebf8b2d13. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FRZ510000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2711ba3ca2447b6ae815f5ced35d2be2be6a3fae67bafd2a67da6d976fa4bf5e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRZ519800366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba3689659eca9403826101b78a6f349966acb74c956c462dcf131ec1ef62bd0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRZ519800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665b313d4abe566b4e11bf07d6050e3a93d469db602dfa449ea1de3a7ca9c7b7. 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/FRZ519500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca3ecdfd7f2f22470af2bd866350f56378794d9d454e637db867909a190a3b3. 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/FRZ519800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ab84ac3ce364ae5775b412af647ad916cb43d6f53e851bfcbd2e2c022bb957. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ519500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46eea30ef7cde6dbd52d01560dcb55d45bbb5d9bc89bba39158e21ace5a37b9. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FRZ519000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacd4a9a07297db1129ef0e0934c4ac8a47670ac68eb9433dcc2bd0c4aba3332. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FRZ519800371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae613e44025c185759378649c20d8ccf491381e3af7c77047dc9e4b67970db0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRZ519100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1154b402e321ff48e11403aad7a60578ee1407c318a09e2529c5e1fd46c6e352. 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/FRZ518700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1cdb33c526d649e919ebba2d9316bc81ca8268eae75dcafa570aefe245df44. 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/FRZ519700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517b7bd692460338fea661f63d7a19a8430a7a39c560ad6aadf44fe9c3e30cf8. 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/FRZ519200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1935388873447ad6f120f29dad918f9df048b58f3aba7a58eaba131d8ed9f3b0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRZ518800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf612dccba75a05d1cce74e5958205b8e88c182b0329654dd63196c14ab69a6. 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/FRZ519700148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9541f14b7b4f3c7a36dfbc494978701d3a7ddd7cff8feae7375c9497fc1fa251. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRZ519300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e344800e14ff92327b1d71bbd8eea763d63f48bab3af8f6efd7ef5852f62e. 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/FRZ518700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e3d9c97e680031cafa9bd67fb6ecf86317536e91e05bf3a44a1ccfc0a7104e. 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/FRZ519800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe3cf79c445b78ff28590f536d0bb13e9d8df67a5a4faba9cbde33b19a48c6a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRZ519800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c1831887c9f963c411be7d16ea2f1b7c9b0bb9b281c409f1262852559b8ee4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRZ519700067.
Sambas - Caracas, Oh Adelita, L'incendie À Rio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3841a4fb55b4f917bf6f41900f46713942016a3ea38da7865cfacaf8ed8a1f0e. 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/FRZ518700012.
Ce N'est Qu'un Au Revoir - When The Saints
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d5eedf0f1ad6b4c8cc3098a163b55a41ad1b5e99aeeb15a73589050e448d8f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRZ519800200.
Fêtes de Bayonne 2010 (L'album officiel)