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 0xc53e2b43336e771ddcc5c23b9818614c72988a2f935b3fd437ad7b7839b439bc. 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/e939d640-5f3e-4200-8e79-24c65ed14425.json and https://artists.proofprofile.net/proofs/artist/e939d640-5f3e-4200-8e79-24c65ed14425.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 0xae25a452602d694400823e39a90fbf4f737f755edea102472e191e69f5c9d249. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/BRSME1000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1216c3c453d64cd07d9b88b5cf0dfa7bbf516409871b35c40b0e2cc11021287. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BRSME1000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e9d92483dda8b9773fed1c8b8dd30c0a8097a334a9ae6939e73affc064b9d. 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/BRSME1000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aebae60996db6f3960e4977f6533580b31ae759b0d28f9b4f4748cf49bce73. 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/BRSME1000085.
Liverpool Bossa (Successos Dos Beatles Em Bossa Nova)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc142a5bf16591f33641cbebefec472742884d86bb8b6dcaa1eca144b96a6e9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BRKSO1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b1b4c0ebee8fa4478f11c6b910b44ccaf8bfd39b57562cf326d491b5270afb. 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/BRKSO1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd20ac3ab61aa7e88bd21d526079161641ac141956c57023f98539d369d4862c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BRKSO1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0233d262a51ad811a7fbcfdca83746e667ae4fe365dd373de07be2e37da67e. 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/BRKSO1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2c2ae80f0243ab2b1e5965e9b42c15ff3b7194d70ea1d46e68adbbc5f3d81d. 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/BRKSO1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e80788a5b4531f202abfa126f18e89e5da3b11e3a1ea6fbeca252c908b093e. 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/BRKSO1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4341273f83cfc226d3cc74814307e0ab6aafc3f48fe2a8f52a6b7046e828b528. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRKSO1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a337fd403bd972c1f1ca3fe123c73ae61c53469eca9e5272fed011a58d70fd. 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/BRKSO1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a62d864239b5c6ff8adba021dc5f2544f51979bd417bc7d83949f14b3076eb. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BRKSO1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b01ddfd8d9684c9c8a8edaf9c698d1a3d04adce4b491b1fa791596e5f7c084. 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/BRKSO1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fee937297aea87957d25cea799a5ecf2febc896ef0eed463827883a5a94a2fe. 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/BRKSO1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab34fe35b0af5edfb3f8233142c12c4a92e09b023527226c919feeb5742e041d. 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/BRKSO1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba569f3c74e82d92399dd2356908511924270a28c3c8f1c32d2196bcd5892509. 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/BRKSO1500001.
Moska Apresenta Zoombido: Monique Kessous
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11025d144ed93c50d7872b7a0f1e4771ef0ba61c727dfd1f4ea96acdffd324e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRABZ0600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e91cbd3bee9b269285206db5dd091c776d8d042ecacd3c41542537f99ce4839. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRABZ0600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53b1f2e63ba12b26d21b3ed15055a8b33028f36fb7cff6ec066a14ce588b77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB580700188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535313988946d6c1d90c128c0018c816052c4320ca7aefcc19ca1d87b733edfa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB580700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8db743600e49109587e3d01c7ea387335a910ad6ce4ad32bd106723df6ec9e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRABZ0500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f1b683eb68ad06a34446dc8b440298cec531ebe730c9d645a1355c31ef243d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB580600007.
Here, There And Everywhere (Bossa Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd891026bd0e0587917c52f63493f7332eb43abd985b7157e44e2a0aee109b0e5. 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/BRB580600009.
Let´s Spend The Night Together (Bossa Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8c1534bdf1f59536da7eb7f52bf42fc46fd8f7d650cb51e9c75591c0ab1805. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB580800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9629da6981c96a9da10d9af7d39df6270b3f5d6a4842a1c923018b45ff0386. 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/BRB580600012.
Cool Covers in Bossa Nova: Taste of Saudade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11025d144ed93c50d7872b7a0f1e4771ef0ba61c727dfd1f4ea96acdffd324e9. 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/BRABZ0600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a913aa55c21c1e79a74fe4e25f12610638f6867dcf8e8a16127167832a1643. 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/BRABZ0600051.
Cafe Bossa Brazil Vol. 3: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8db743600e49109587e3d01c7ea387335a910ad6ce4ad32bd106723df6ec9e6. 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/BRABZ0500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e326ec07f88e4168e838df31661523ee098d0c6a2c41cb6e87444f0295da5e. 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/BRB580700304.
Cafe Bossa Brazil Vol. 4: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535313988946d6c1d90c128c0018c816052c4320ca7aefcc19ca1d87b733edfa. 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/BRB580700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9629da6981c96a9da10d9af7d39df6270b3f5d6a4842a1c923018b45ff0386. 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/BRB580600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e851aa3e39a2a83a8d0cdf9ed58bb3dec672dea39e2cf06916438508c3b722b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR6V81584126.
Cafe Bossa Brazil Vol. 2: Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc17f45db8d13c59d1965db7b8647fb55473597c55206fbac57a4c7965726884. 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/BRB580800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee965e49a6006f04f7b5e31afd610a651524aacdbef29be5cd057cba5e5e360. 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/BRB580600006.
With A Little Help From My Friends (Bossa Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720dd6b684aec14415ad461e80f64066ae30a3304c90948761da33243f5adfad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB580600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd1af35bc138c587f153e85fa3e9ca7244f94c7599bd0f9e36fb6043bde94c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRB580600008.