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 0x93282e7bdadd6db709285310d5ab26841cd2e73dd9243e876935b916d855be54. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2554265d-7766-4189-8020-f2b0073bd0b3.json and https://artists.proofprofile.net/proofs/artist/2554265d-7766-4189-8020-f2b0073bd0b3.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 0x7f8a39374cbae99127ce371751ace005d78d864c04c8b0a2cc8de6cfeca06a8a. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZTB32316937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a69e7103384f717a55abeacc9388c765060a9e0e8940134447a5fa74958fca. 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/QZTB32316941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba84e2e13d6952f34c5864f5aa09f3be36dc594c2693cbe08491715fda2ec3. 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/QZTB32316944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cdb3b89339afdd6bd9541aa23a4e30bb27981c05fe5e9fc125468dbe581de3. 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/QZTB32316945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99a2d3b75d36b47763d61844cefe879a72bb69a8c6ae60d52e14421d5dc10ef. 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/QZTB32316949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cbf2b6b76239dbebd48361cf82753dbf9227cb369ad38ab78137d4c3159f78. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTB32316950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483a18bd88d9f44e01b712919d0d28f638524f085d647c4d182e81fc1db0676f. 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/QZTB32316951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a687429fe0fc421a3e29c2f553cf381868eab4ddee69b94e1d7247351a4d0. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZTB32316952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b826a9e9a6ec359d360b150c53a87c2de274a0a7244a285fd069f05b0a96354. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZTB32316954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003cf377a1a891c1c334d899d3b3f0ae393527d71c7a7b277f3071f34e723dcb. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QZTB32316955.
Humildes do Som Coletivo, Vol. 2 (LADO A)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e160b328b1d2590e5b030ee2518b7e0969d74c69a933a2d281a8a68f965c0. 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/QZES52402875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ff4df1fc265bec275a10921b655077483386bfa8d540ccc97fdf4970f6ee63. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZES52402876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38c895ff110840c6281e1a3d12ddcd130d92d91c0eb79101ac57876dcab2ff4. 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/QZES52402877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f60375e175586b44f82d97e0df5af922cc4e6fdea4e47244a96a7a36f7e49. 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/QZES52402878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ca3290a206ed1694126f55b26a99dd7cd67a9dc01525d755bb25c3e819dffe. 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/QZES52402879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49508a2d6cf71c6e389549eac1bbaaf4ce9c223a45a785aa75e5f994c0e3c79. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZES52402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2a0615126efdc2666d2fdb3463dd17241fe629586ef707497d0d02d64cb797. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZES52402881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a86e2d9ae860817621127a0a29b6d9943f627aa711848b6254213a97cfc175. 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/QZES52402882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9b23d96e92dd9fbf1768063d362f91984412127e34ecf30c84b99b4820bb7a. 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/QZES52402883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aab88de2500971ac0d1172a3ec156c8b571239341583c4442b79ce02ae246e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZES52402884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248457337312d41f507352b3f788e9ead7255f3c2e762dcc77ce704180b20a1d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES52402885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62394d63165ce2241570da716dd21e7ea9780c540ba95898705cf5fb6e029999. 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/QZES52402886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc6bd3d9b67a4bcac31881bbfd750398f79ca5eb0c21399259473e79e58e831. 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/QZES52402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8a9a45d15ab7eb3640a7799e0814513014e1432fa6c13c7b930db4a7e9d0e6. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZES52402888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f8e6f2037a75fb7ff7fb026b1cce452b89e696c80d07d4af99e3f0a5dec03. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZES52402889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e1e25df6fc6e78182221e55e003c618025c55a79dbf88f0decd1d5ad9565c4. 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/QZES52402890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d011954915fc15f1086021ac0d0c2960f0d3bdd485949cf1fbc47e0d604e86. 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/QZES52402891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c09a2de0c7844694f4fbef0ce88a80e3091e3db2035c10dfcd663be350c17f6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZES52402892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5207dadb9e167237d9e6d1fc3ed9da44922d5b452f79be4101374b0344110e5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZES52402893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d474908b4f5fa1ac20deeab8e10e089d87b20d024721e13396c0ddc162b68b. 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/QZES52402894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adcb3f3c7efdf3b78210d19f16266794bc4b709f14a5221467728345187b852. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZES52402895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68fe260e7624d033ca7b8ab56ef3040403fb2fc48216f690a21fe021e06f9de. 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/QZES52402896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5b716b11652d6f4e369edc33fef1c3a41daf4a7d4817958a0f12123f84fb3f. 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/QZES52402897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88ee00bcdf0d3289f2c935d2f9ed9bf5571afedb9c0c232ec43095a9317c178. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES52402898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0ceac5e9f83e7cdbe91f447465909c8c63d83103726bb40ba1315efd63d40. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZES52402899.