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 0xcc3031fdd18b93e92907dce0e0412f9065a199b33ba3780b3db24af4a4600065. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6547ee05-ce5c-405c-917f-40f6d403edf3.json and https://artists.proofprofile.net/proofs/artist/6547ee05-ce5c-405c-917f-40f6d403edf3.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 0x535555dfb0cd05c52c4ac69dff179f9167bebcf9416eabf93b4440e9fa65835c. 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/CAD621700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb9c60f78ce7453b8cb0bd3f344e1e8bc64344dc05ca3b3d46281735f160173. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CAD621700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56d6cebcd9e24ef22c8e2660b31b81c3292bf1e01317f0046a7e5b4caa5e26f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CAD621700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd285cbbc7f13f8185a83b670d17134858cfed943871b5c7464695fe9a2b24691. 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/CAD621700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3218d08d73c25ded41a1629d387e57b64ffec3c7a7da7c07d7a281e6f140f1f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CAD621700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576cd86e5b6cd3705f38763eccb71c7ffb4f7ec07bd51d5ab8d32b9328e6c76e. 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/CAD621700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab82be7ca7e2de166740ccc179b20daaae4b5abe694ea669825f1f9ea756c87. 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/CAD621700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ec87fb966d30d1761085a2886e9aec74e97dea76080edeedb006784917d042. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CAD621700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3799567a46531236d683ee02e077ed8cc24dc3da09eda0555fcad6b278aee61. 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/CAD621700009.
Le loup, la biche et le chevalier (Une chanson douce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822076a434ada04c1a58be3423b5fa33d1e126e37361f34610822393171febb4. 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/CAD621700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6c0d7a830a76e1ebf9c2e844b68ab9bca2ec1210b5ecbf4f73cac33cb0b1b. 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/CAD621500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9077f901e8a2cd0d42e4dbef4da6969584568751d7bf2d04655fc557753f34df. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAD621500004.
J'en sais peu ou prou de la réalité, je peux toujours rêver, je ne te reconnais plus du tout
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0630502b9abc2026ea5186d55b7bac3ee46f8c9fa6ca5e295ce1968e68df34. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CAD621000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82527984f90d5774b809e707846a87ded6c2933b845923069f2ecf5dc23b3d07. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CAD621000011.
Des pas dans la neige (bonus track version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d60ebe0efb320074d3364834fc06bf58e60450c5ebff5c99294a6b6a6d8c598. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/CAD620800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a2b5dd33402948059172bf401216ac8d5b0043a34b59f857f0e59fcdea55e1. 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/CAD620800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921f08cb87e21c382dfb4f3a72c218658eae1e1e0ef2c5c34a5a1145df77d783. 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/CAD620800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9b7c5fe3346a638699f68a1f793f0132c0b821074c19a2ac701ad255beb381. 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/CAD620800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ed09794a14147d9407fc801c9563305b6c6387af6437d116ebe7f32c693ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAD620800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d152997ab4c203b7b17c2f1ab96874aef0705117859bd126f91433713e2db55. 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/CAD620800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5337496cf403966979d4d07d4be0589517b55b6fdd8c88dbf157bf93cfb9d884. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/CAD620800019.
Boom boom (Merry little Christmas!) - version française
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdafabd4519431017792e8b0856661dd3d8394bcbb54cf4d4540c1c4e63f988f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CAD621100004.
Variations sur le thème de "J'aurais dû rester couchée"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08c5e3c31f5fbc695c481102d6ddde517eeb5317bb7aa467ee1e60c57ce4a84. 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/CAD620400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c7cae0dc719c61e7926efa24bfc710d2a39f409e6d58c134ce75b7c0e2f58b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CAD620800003.