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 0x67e140ff61ffc78fe29d347a1873c69ca7f4fe2ccf96719915aa5bf5661f1cb1. 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/d2054d97-94a4-4c94-81c9-066a1e7bcb28.json and https://artists.proofprofile.net/proofs/artist/d2054d97-94a4-4c94-81c9-066a1e7bcb28.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 0x4d14ab5bc55bd371a58eed436d9c7f9d4b7e29bf6f01c7b7e7db0737e57544df. 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/BR4W12100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7ec915e06f6a2ce2dace1c5d917135d4385340ffb61c7dfc2695c49697040a. 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/BR4W12100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001ff8b63f3fea461db6ab36df943baaa1a20b4bbb036118a62795e4577205e. 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/BR4W12100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dd750df97e3bf4afd7641770cc49a0c89ff1fad1880fe6ce14be299b0d4049. 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/BR4W12100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faee9c1d7732222345236db199e7469de0cd22511e4e9b8614cc709dfe7a403. 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/BR4W12100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba61a1097cbca3ef4a0f90d38fcfdf0f035754f1cca2dca42c54b5c416957cf. 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/BR4W12100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629f794d388f0ae4c620699dfd006e76020a979d2229e629fb708001a291004e. 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/BR4W12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a52c10ac74336ca9154a6e8c82787759738f18cfcad8e1b315361f31ea8b23a. 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/BR4W12100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86289d458fa72c09c13cc3459c3a8b1ad70b6e568bc09c623a332d611d1bca33. 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/BR4W12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629f794d388f0ae4c620699dfd006e76020a979d2229e629fb708001a291004e. 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/BR4W12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d67ed0c5570f545e5145354154e0848c1c2846e1eb7b2cb018f746fb606011. 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/BR4W12200021.
Teu Amor Não Falha (Your Love Never Fails)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8202122c77719f32197ae251a06d47112b79bb4c870b3ccc78e354bb0d1778d3. 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/BR4W12200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f94950b0d837b68c3d1bb4111ef28382d1912acda72f240e0bcd9fba74a5d6e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BR4W12200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d814afb8a4b8b5e232d39ce79e89fe2caa359527dca49f29700fa237ed28fe. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BR4W12200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb711d142ae1c455f4c0f424560e4e9ab792a9d9c97c0d87eb092ee51117d32. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BR4W11900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fcaa35591ebee7f74a24604e9a453acfa4d1c41d8e1ad3cffe4fa42e001ff7. 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/BR4W11900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11feed7f4dbc153852ce3ae186bb37ff90e521ec556fd9af703ba0daecdd427b. 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/BR4W11900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a1728d2dae39c7341db2d9c867ed758a1e086f479fb55c823883bcd80acb9d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BR4W11900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3ca15d50594fa8d2b9839168fe97886c7c0f594aec7a4aacf1391a212a8001. 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/BR4W11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9290a9312d9b4fce65311153d66275a3ff0087cb38845e08cf5ea3999ead682f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BR4W12300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5af1fec2d794bc5f249be4332acbb549d51b95cf6b4573db9420c30a353f38f. 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/BR4W12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f49dc280aa2272c66c93e8426b74f0e1d1351ab8b53765a7b08634041b8120. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BR4W12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa456094126d4ac8364cc7c042bd4ae9ddb4de1b06273b721e5a07d5a26514f26. 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/BR4W12300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db0758ebea4b1d01c5793ac9bdf7eb2fba0289d2b00cdbda4eb318c699962b0. 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/BCQRA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f94950b0d837b68c3d1bb4111ef28382d1912acda72f240e0bcd9fba74a5d6e. 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/BR4W12200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bc102de4c3e6e15d4849c24e76e2708d773a7c09f52eb281f73f44c4efc379. 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/BR4W12200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd48f25394db9cc6607c11b8ad75248382ec2b9d3b79cb35f11498cb3fca723f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BR4W12200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d14ab5bc55bd371a58eed436d9c7f9d4b7e29bf6f01c7b7e7db0737e57544df. 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/BR4W12100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a52c10ac74336ca9154a6e8c82787759738f18cfcad8e1b315361f31ea8b23a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BR4W12100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a416798ceb9c180ed55a0b4d81fb1d58991ea677828e8232dc7f81f46c3c1e1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BR4W12000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff8acc2e5254b8eb1aab292daa52d5feed87dfaa6f58c1716f32efbb69b94cc. 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/BR4W12000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba72973d6239780eb48e890fe87f2a9dd2dd02743bca35d20a9c55158f9caa. 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/BR4W12000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a6db81561c9161f726a1a83db53e41c8db5ec8d27e80f78f02b8a87f80728. 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/BR4W12000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fae04ea37577f6d45c1f96a99d5947f5a52a2f9e2ee48aa6acb1a5e95275954. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BR4W11800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d16c9b6f31328845cc27b94c76879d52e2f39fcd58b77829abee39ee2daeb8. 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/BX8XA2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1bff04ebce2cb576cfde127384453528efd3263d3472182d5a6eed13b093cd. 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/BR4W12000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9f45bb431c00cd22b6f00c2c08ec8ab30dfc72fff04ecdff49d2531d6e9f5e. 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/BR4W11800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f76bf6f58306d19b54302dc70e64e05de8243163a2ae49ebc0b733431401cc7. 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/BRLE01800064.