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 0x3f550df0ae195234bfd7852fb7640b687571695be71b68ac730b53401199ef8c. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7667d52-ad20-4522-864b-e74b601fa0a8.json and https://artists.proofprofile.net/proofs/artist/f7667d52-ad20-4522-864b-e74b601fa0a8.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 0x0c3b94566b2b7c52584e83ff2fbb2a5926aa80a1ff96cc19a180c3af5ad79156. 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/FR6V82139540.
Xico Bizerra: Chama Infinita: Forroboxote 12
Valsas, Canções e Tudo Mais Que Há, Vol. 1: O Mais Intimo de Mim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a7ecb1df1052ddcd2d1d6401d71d9752d7940a28ca65c5170645906a9e258c. 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/BRNPD0300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dac0a392dbfbec7a84ddc68f60f30f2ff0594ac4ce50fdc4d9b3925303dcb4b. 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/BRNPD0300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1f33aabb6c951de4a8b267f50d350823c7dd8d255e8a86322553d99e637854. 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/BRNPD0300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68044fa9b5c02f1ab1c7b41a578bdc17d82e1afa5ce8d970f7cc7294af56a6. 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/BRNPD0300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208113dbc22e56f05b89274e73825cd8fad837bd5a8beb50d674596b174d2af3. 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/BRNPD0300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f75deada756ff7ceedf3c2f37c548a0b3106df5b1871b9e7044dbc22a5aa730. 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/BRNPD0300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61acedd16c09667e25f6ee1c9d4e9809c5b893f0a536b28e3118a57ce48ab677. 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/BRNPD0300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90309f42762acdefc4c397d2ea1e86c05c5c4b2d3ba6869489d37d80ca386a46. 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/BRNPD0300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd579beb9443ed5f0b79f8cec09e284881692c55f9bfb7053e65b478ae927214b. 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/BRNPD0300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2cd18f5ef6a33b9808e9b1b1e1a2b3c3783e4252c9bfe27a5fd5404ac511d0. 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/BRNPD0300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911ba0d2b36afbb21b0c6969b75b64fd6c4270dc4d2163af5f3fe020f1c72b19. 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/BRNPD0300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a47f0e6d451dd87011ae90836313f272634369154901b1f5d5c79885bf2a34. 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/BCDQH2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb98bf85c94d7ec0d675ad91502209c8bb93ab53b48ccb7e2b0dfe8ed4eced63. 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/BCDQH2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606bd1dc371e2526f851bab9d3e36e62fbd501c68c8e299da8705daa605b94dc. 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/BCDQH2400032.
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