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 0x3cc2b1a527e725e284fecca13c72a9249b0bcc2390b222f056a52d964ae6c2a9. 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/dbe7629d-1bfa-472a-aa2a-bb48c92a9b1e.json and https://artists.proofprofile.net/proofs/artist/dbe7629d-1bfa-472a-aa2a-bb48c92a9b1e.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 0xa5dfd83233ac46f9c4cad4f859a2bf0fe6c9a5b9791e45a24cf733d73c32b84a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QT2VB2403423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d373253150f1c4f186919442af30f2d2de5a66d502333b81fba3f4df87e23f5. 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/QT2VB2467774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27de2a24987dc60dc79c4e514470fe5637a0fa00ff49574cfcbb1508d545147d. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QT2VB2467775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978c0591ab6df78c8cf6be3dc3cd7e99775f44752f265f8a0c95536e126fbf75. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QT2VB2467776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e2a608bb4d5a1eabd17b018d6332e8012e57f49b5eb4ed9ff9c80ddc7ba170. 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/QT2VB2467778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae5e1ae856ae67e553a7b2a64a7a7705c4c2a659a4ed53dbf78c408a3a51a5d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QT2VB2467780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd9257eacb74a13f4cc1ebfc7b4c34bea4680aa5d006e451ca6a0ce22b4e38. 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/QT2VB2467782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea7f0ca26307236cf32b25b2073ee5cae0e5d8acd19ecc620216548fb0831a. 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/QT2VB2467783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c682dbd728bbc7009ac716b3d7e8e5f024b5ad680dcd37b227899f7fd6002a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QT2VB2467784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff53cc01b04e31df573f8505c12951ffd153bee8333dc847d762626434962c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT2VB2467785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78a56c0d9bc3727c5c34d835ea2720fecdcb74262743d367edb808cdc1251b4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT2VB2467786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7352d512d6186b1ca2d41677648241bca797fa7ca94e73e0f25d696b6385f463. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QT2VB2467787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae802cb6934b6eba9c15f56aef1383e51181e1e0207a98a8c6d74921e7680546. 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/QT2VB2467788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48132a410e3fdc89a1fcff98617a1ee18d54195a60b0721ed825bded314f2cd. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMEM2519815.
Lofi Cafe: Chilled Coffee Shop Music Mix
Lofi Jazz Cafe Study Beats and Relaxing Tunes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8b8b67f717a1c342368fc9a7ac38f530654bd0c423a985fbc0402847af24bb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZWFW2574806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23898f5f1afbd3b113eed0ea334f6ef56b1a7cab12c9058ed28c44ad493a7f53. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZWFW2574807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c439993ac64616842623daf46c52f4a8159312a4b53738c267f78a013a3d93. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFW2574808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7947b54c490f50ff121225168b49eca6ed529c189cab2d1efbbd656bbaa679b2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFW2574809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091af8ea6677d3682c5cd37d2315da4ca76df958049432518751080fd141a890. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7R2504360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad818b21e6a4691df52e19336a14da383612da9929f740f4c4468ef9f2b0334. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZZ7R2504361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a732d3a72d82236987eee47c509e5e796e8c1b0bcb2bdab9262050bae0812f. 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/QZZ7R2504362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06dad67f02968cdb88e3745cca0ebfbe9b1fab2b0e0bac4e3b6714b1747f127. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZZ7R2504363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e8f7305bf5491ce2bbb515ad878b78d9bc0f55e8e26e708b02d24907696a47. 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/QZZ7R2504364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f19dc9698a33498d3ceed879f4d5088a9bbb2fa276f7dd6926570043a3557af. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7R2504365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc1dfd09c7badfc219f46126b7db5e51fa2c80a9dd1c9288ce76b6dd7a57bdf. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZZ7R2504366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58154de081d927a666b4520dda484e520521edfc5f04d0ae0435e2ef3e75a2d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7R2504367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1ec68b873f6b67d9216a65a1d8a896308b159b234bc9c9acf4f4989ea07b9d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7R2504368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b37750a861b9a2e78ed0a16a29e454ce42945c31cc1066e9c8281299ec92e6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7R2504370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce99ace02bb2721d9f9bec955c4f3885161d2fac0deff2fa75a0109e67b467f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7R2504371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb994df7a894215acb0774a16b582e6cd339ad49903feaa3554bf1b3d1d45c1. 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/QT6E52543349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d6d9f88b2c0f666e3b952426227aeb052492b010147b875a95c07e028aa667. 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/QT6E52543350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3c0d04abf60d529baae3e4b9d37cd60894da2c4bdb64be55cd76f72017aab6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT6E52543351.