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 0x2362abc46f1cc4b9fb27c458f8242abb5a565c9baf8c3c6ad600887148c5e156. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a105949c-97a7-47e5-aa80-b3b1e8ab001f.json and https://artists.proofprofile.net/proofs/artist/a105949c-97a7-47e5-aa80-b3b1e8ab001f.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 0x8e1b4f13393ae57025dd8d4e0edd18a9b4734a6ef3a8c6a1d8f0e7374ee04824. 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/BR33B2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69868980caf7b45138cac7a14ee2ab9e91b47d0ec57732a7cca988428e22e1d3. 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/BR33B2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd310eacdb23d820e44567b7054c58d1c61da50473e5b794f54efc0579c5d7f8e. 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/BR33B2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec820abb64828697315ae23289028713fb6afc74d2ad4b5c84b54d384281032. 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/BR33B2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f8a838c19e0b5b6b6c069485699a249164daf2537a7f2dec8412a5d29eff3c. 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/BR33B2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029ffe9b66bcec0e8aa9f25ede795b1747163d5e16a5782374654aac13b575f7. 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/BR33B2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06299930384bd7ce219c59dd7744ccc4f55d897e4da51399bffbe15138449f7b. 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/BR33B2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32721715c10e0806dc9f394a47955deae3e6d6ef70fae16feb331b99c2326263. 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/BR33B2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0c3d08b3b9524592153c613570d1b56c9ce2a734d34a349cb0aae64bb31c50. 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/BXZ4A2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d31500348a8aa2a92c679d2150a21ab0315f73c1b0ef8b52cb76fa0b63da534. 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/BXZ4A2300002.
Moacyr Luz e Samba do Trabalhador - 10 Anos e Outros Sambas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ee4e067051fc3a5ad38e3f4236d5593ee28ad0b3c907dbd084fc4582e4174f. 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/BXRMZ1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22839cf620ddab19cf21bcafb2af6290e3e39054ae070c5a150f69aad7a451. 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/BXRMZ1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33b7d56307eec4b69c5f08d54502487345173fded57df2f73e1714f8c1441a1. 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/BXRMZ1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989378089683604ddd87ab34c2a4525211c6b92fd7a749253d1b9bb06f78e892. 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/BXRMZ1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59efb80da2858cd5e51b80e9775feea83e79e2cf8d51d7809f9f88dc51521fbe. 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/BXRMZ1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53994c95e6ad12d9ad7a69a0a19e799b2824f7a5de3b1147909feb886350199. 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/BXRMZ1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b987336ed20fe60c1d8ad7dfec0fd676f0797c3cea183b6bd0c067ba585f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXRMZ1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddb5cf5ebff5616a3945ec3668284fb52f3534edc7b8a8e91e42132c1783b8a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXRMZ1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f69e8bb07653e583152618ad0a1615d368baea555d2e60d59449a22afe78dad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXRMZ1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61675411ac37035da61a7d452edf978c2771d8861752d76b7599c18d5486882. 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/BXRMZ1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9375d30fca03a4a9089a7f7a969189a669bea89d2b6c983331771ae5eca7d50b. 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/BXRMZ1500011.
Rei Vadio - as Canções de Nelson Cavaquinho