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 0x7513fe64fa978bf16634dd5b3138b2904538aed8d362bf71ea81c0b657d7893b. 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/5e79efee-c4e2-475c-abc7-f9ea8c04bb74.json and https://artists.proofprofile.net/proofs/artist/5e79efee-c4e2-475c-abc7-f9ea8c04bb74.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 0xf34a4ce2ed386ef0544a1fe06daef8a0dca14d1810d970138e6d4cbefad22974. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/BRABZ1400008.
Raindrops Keep Falling on My Head - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2248bdd33c9d8454b7d1841cb1c50c4f065112d582488bdf7744d81008672dc9. 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/BRABZ1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a56f06f43df19ebdaece7404a1af4c5225a5dc092e4d6b19b776a7d0181efe0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRABZ1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9884ffd77550a8cf72130fc9346087363b9137984f44d552b7f721a9495d659. 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/BRABZ1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13a59eb53b228ec74c70d1e7c0ae84f23ca79a058ca2bfcdfb9be7fedf7fdb3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/BRB581300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2481aa7828a11168407ca0c3241fbe5ffc60092d22c127e3bfa360b32351d709. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRB580900256.
Bossa Lounge Brasil, Vol. 3 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63568f6c0ea2c728f1f225732525e3edf43156ef165826ab37ac8c30029a6869. 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/BRB580600037.
Cafe Bossa Brazil Vol. 3: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2481aa7828a11168407ca0c3241fbe5ffc60092d22c127e3bfa360b32351d709. 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/BRB580900256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d1c2b3dd2626f2ec66d11a7e1276d528d7b3696d532eedf0201ee897426f32. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRABZ0600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13a59eb53b228ec74c70d1e7c0ae84f23ca79a058ca2bfcdfb9be7fedf7fdb3. 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/BRB581300030.
Bossa Lounge Brasil, Vol. 10 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f4f4071c297d72022c4066391efeb000ea82ae3db53691da5053635723838a. 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/FR6V81561159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bcda52f9096dc9179f69b5ee36c9176fa050b3376db841ee60c0ff0a40713b. 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/BRB580600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe87d2759ebee37b4dfcb2aa2c1c570d0f338154333776eefee4fb616f57bb47. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRB580600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63568f6c0ea2c728f1f225732525e3edf43156ef165826ab37ac8c30029a6869. 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/BRB580600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b7dd17821db852527eddc926c5a1f47e1571a6b1606ffa808865b701335550. 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/BRB580600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13a59eb53b228ec74c70d1e7c0ae84f23ca79a058ca2bfcdfb9be7fedf7fdb3. 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/BRB581300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9d0da5c0fd463084c487cfe43641392a6f5276734ef99a1d19be6483d72be0. 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/BRB581300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1015a784c9df393e780166fa496c14c767cc2af8bc15a80716e00a0462299a. 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/BRB580600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6738df4a85482f975b2272e983a889d1e683df954b6d893a61810dff9a3b62e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRB581300017.
Bossa Lounge Brasil, Vol. 5 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48877cdf505376e0d59fc938fee506fe7ec21dad0e6adb6aa1dfc676364873fe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRABZ0600053.
Ballads in Bossa (The Colors of Love Ballads)
Cafe Bossa Brazil, Vol. 7 (Bossa Nova Lounge Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f38c7cc3fd6305f405d5bd8c3ab76c02fda52b230eab4e25cc5869ec9f7d67a. 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/FR6V81996969.