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 0x227ad62806f205bef217cf257fb29629932543f895ce38183f884ee312f3a92b. 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/07e3f3d1-7373-4295-bb79-7f482d47e3db.json and https://artists.proofprofile.net/proofs/artist/07e3f3d1-7373-4295-bb79-7f482d47e3db.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 0x9dcf4deb832d3c7e9c9156ac490b3788ae2eea67d6bf1477ea7d60c5c5e4e4d4. 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/PTLR11200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f0ef683f2a53d7f1acd1be1ff6f293481bd0b2fbb391cd3d21892a89aa8579. 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/PTLR11200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccde6344b64b17741c97d1d7a8166711029164fb5bd97c48b39dac9ec709ca36. 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/PTLR11200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66065c0d2fc47ce3d3162d7bc0fbbe0e38b2f0d938f4db2aed43ec8c32de2c9a. 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/PTLR11200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb9671c18982cca798d2d6fbf043c21790f741d5b686e849e622804475e895. 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/PTLR11200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dedbec08d5f3a067095838eeb92a4711b71e812d9cd8683df27ad219f8296f9. 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/PTLR11200006.
Como te quis e te quero (How I Wanted You and Want You)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74566ca20a5819051987347cd4b2a7a821c681ff8e494d92580e616ebc528ec6. 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/PTLR11200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e660e7fc96c76226780f48af5104b8399c88f05f0c347dd1a2932c52542cf47. 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/PTLR11200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc836f002402d6a1cde50cc026e5980f36b7629efd38004db601a33395817cf53. 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/PTLR11200009.
Desde ontem que te nao vejo (I Have Not Seen You Since Yesterday)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d00449929c80938056a3cfab00b8f11aac42ca44b1157aedac63511963249b5. 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/PTLR11200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da6df3c9b690f7c4200763d3fafca52ca5fb0389a5c7a358f5431e69aeaa93a. 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/PTLR11200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc68209f52a166f437267342a9b48101da742ceb20ab0bd49e728a9e1d0eeca. 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/PTLR11200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374b67d61a491f328c2fe6e1b25fa7fa77d395b9777334728fed2664a8beacad. 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/PTLR11200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ac9794891bcb9f4019922e9c18ac9948730a2ef6251459d3a60fb2f4fc7a5. 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/PTLR11200014.
As palavras que eu procuro (The Words I Search)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb20378558b67bde9f5be1883d4950199a96a897bb5ecd2741b99a560df24dc9. 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/PTLR11200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b779220e282a1e60123331141ed643f3e92f2498d40ca92a3862155b893c2. 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/GBCKG0701842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c7c77c36cfaa22be8bb13d1b5ec705207eca24844b62347e61ac14bd428209. 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/PT5EL1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83347ba8ccaeb6f7085061e8c671bbeefcb304c3fd56a3b87f252054b60ed9e. 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/PT5EL1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d6e858479d8f4a6e6acb8046806b52d055f4990a54175030cfdb9ccc15c1a3. 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/PT5EL1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d98a31886e15b6e6d099f7541b72d6dff83ee618c14bd86b17ee2da34c011d. 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/PT5EL1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a054113707d59a12f6c8bbbb90298a1d7b72632137c1f82b2b90ecf2cb1f68. 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/PT5EL1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499368b135db014b7d39f313caab3b20cc2c9861f1af325d0a84a0d735db259b. 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/PT5EL1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646ccf17cc413fb2e36d67d86d81ea1cd1aeb3fe263edcae5656d04a02995f94. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/PT5EL1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7527175b7f4594dfce2ea629078d85a415f92cc34c702ec3a929ff4d7a4e0. 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/PT5EL1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff8d97d440e46fba8627660fe387ce7718cefb5e07210e3f0996dafb2b6ee89. 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/PT5EL1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd17d267a8a38eaefaca687e90b79e8bf810007e55a67f0254f4ca113ebb7775. 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/PT5EL1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75112c8b19769eb3737b742fe0fafb5ae8afd80049e74ae06ac828d8aac4a6eb. 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/PT8EC2203002.
Grupo Folclórico Tradições do Baixo Douro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd75801f01cf94d230c110b5d49a7657b7dd9ec5f0ed8d1a791fed66daf0d67. 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/PT8EC2203003.
Rancho Folclórico Stª Eufémia de Pé de Moura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b1697758b3f9b980117d297b54ef227e78ee9e635c3288a5748c67ce6eba88. 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/PT8EC2203004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c7925d20aaa764ba1bf50e8b4333a628a07686adaade364bed1c9ef9b3db04. 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/PT8EC2203006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a4406441867c1c6cdf83d87848e3570296fa0a9212d16c0b8af28b067fe8c2. 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/PT8EC2203007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80888a8f4229f9eb531f9d90a765fddbd308e1e10847d68792421092126c189. 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/PT8EC2203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaacd18c2f1ce3c5d595f0ca6515ae0f5399b471f1aea67c71808162966b8d72. 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/ES69I2401475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3004a67c4748ab0e98300e6a615434c51f4ff0ae7ca8e6ef53656a10bb352102. 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/ES69I2401477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b1e9d1a2153e83d1d579f585df4b642227552f11829492d10ad5a185988c12. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:58:56Z), 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/ES69I2401478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8146652bf76e5ef08f2eb954bce8cecdc80bf135b3253f9e90cd3416ab814f1a. 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/ES69I2401481.