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 0xadf46065d3d1a8b347483f2bcb34fc0b3a75a0f25bbc2d2247d4d00bdbaa0cfd. 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/bb5f3e25-72c6-4025-8436-3c8b0ceb7f53.json and https://artists.proofprofile.net/proofs/artist/bb5f3e25-72c6-4025-8436-3c8b0ceb7f53.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 0x7c903114c8eac43b6f3be8cf7bd421e04e7b8336c594c44f820f6bc615cd54e9. 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/BCIH82101489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b78b175f10e5ae67c8e091bf2383712e2fd5c316a510904b972998dae53673. 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/BKFUX2301592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e83a89b0ad0b6b22a11b453bf6a755d1e7a429beea1bd941b6fb15fa2af052. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BK2242401185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab01af43adf390c762988ac474223b16108e874603331ab711d9b0ddcce8dc9. 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/BKFUX2301593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057faf69cbcd9793b91716044d1c0603cab36cb4e24cbd1be20b997633f62eb9. 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/GXD7V2320997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e723fa71981fe0635f0f5d7cde884fe9f4d7fda411039b05e7bf659608db37. 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/QZNJW2457588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04548adb26bfe93cad538956ccae7f2b08e2eda83d49d47a30b3be4a7301b609. 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/QZMZ92485407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63c748662e2b9f6ee8abfd263b0a18593c121ce402967b3673026ba3cc85b67. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCZ582400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c16f9fab3795e869d7eaa85c998ebeb726a2bc4bf46210ff3a20abf437a293a. 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/BC3PG2401044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05810d01251d23567cfc4248c19af101e469358daf19bc68fc9beb421ff7c903. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB2481979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aac2bb7b189b450ad8bb12dffc20beb40eac68ad2e991cd0892e56b1c3b7f5. 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/QZZ662424894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd804fccd8e3717a35d4c0a84a2466de67061ef0bd1cc8a33c30bbcac03ae1a7. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/US7VG2476337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cf6bba1c7fbee8d565575d9670f013ca804d3426d2ec2e090ad77c2261506d. 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/QZZ662358046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3e25dc21985d498e36fad01a262b3b2fef492719ee68670c315d542e7a7680. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTVM2391230.
Na Intenção de Tu Sentar (Slowed + Reverb)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8de4df6a1f5d9f0aa8ca8f853881bbe61473d33dc3ca7020b94665a06d8d98. 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/GXBAV2317601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7207cb62bdc1cf95f318100366e85c2e23fab10794e93387dab74dbb1cb9dd4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTPX2321558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f012ad668155c08911e51461529c91f6a205afb100199da93d2f5d8074ad66. 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/QZNJZ2359945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbf8e6a1f460a957e27760ef840e450a48db6c324bdf8dbc0c4c1a6a546c967. 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/QZTPX2382414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c30095733992336f0d0872596849298e61e22f6f8e3c2ce1f1b1c2c675b5e8c. 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/QZNJZ2391469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783f1f90dcac2959ffa4df103a1602c2e914e07be10179f7e777d31e344f8aae. 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/SGW502361720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfceae67c74de2c1207aac3cad53659212d818f90b2229c616e7b84fd562ce2. 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/QZYFZ2348354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98db35d2b5b63eeece9c55462a2fbe7506a4a0887fdb351ac73f65d7f9779fc9. 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/BKFUX2300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652c4670b59af57655fdf7fbf95f29ab01519422fbd25ad28f9261091c8dc125. 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/BKFUX2300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26a8818b62be6d2cc4a417b4980c31321df15ddaa4bf2baa7db4c7630746d32. 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/SGW502315624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d375a95be1da2375d6511bd5b0232979daa2e53d1553437eb5481b296088ff1. 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/AUMEV2365385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c2ab67ff54c9ff3dc9d4d0df9fd9f1a0bc659c231e0af99c44ea97203414e2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/AUMEV2365243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0a51c6d41205650f1339d4f8d2c36a1d13f05064e14c6829aab2d26a9f9564. 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/SGW502303198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc8d95fbf9fe1fa351c2479705481b2c85b7e97435f4b5dccd59e879b3e068. 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/SGB502258152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c8d6d16e510ba45e73ce4215b0653e4a2658be7d57ce28ee9d8d2f777ff8dd. 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/BCHBB2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d1caff23dabf88aa09961b01632a05de159f4de33951b80f519a243349766c. 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/SGB502259771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866099be4594ae8f418f0275c17d78e9bb4198d703d440052ac613b75ca9325b. 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/SGB502254607.
A Última Faixa de Som das Sombras (Slowed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee405027013cfbfd14aefe819ebac646878c55862d9988c001265ed3bd5207c7. 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/QZMHP2048241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd130db2f046e5f5ea2d9afede9a1163fd4965adcac385c0873409e996406f7f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX452121977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b9019b0a870e3a4bcf0de80b891af6b5c7e77c2d295303489ee05e911713d8. 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/BC9MG2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22c811635199d02c07c79ed570023071e7c24be5357a7d231ddcf46d6668421. 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/QMFMG2367752.