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 0x5c7004e76015804ea7e7e18bef2119b2d754561cd63ca5b7ae866c6c2e2f0339. 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/8a9c3c05-755d-415c-80a9-fe749bc6cc05.json and https://artists.proofprofile.net/proofs/artist/8a9c3c05-755d-415c-80a9-fe749bc6cc05.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 0xce9bc61976cae5ea568a550f8208ddbfe734a2cee67d2cee8c2f49bd283f52b0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCM9B2301063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b5b0cfeb211db2e08c0365177043e5f5b752cf983a003a219211d470fc4a69. 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/BCM9B2301064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5bc6d22221f1e8e638957f258a9e91da4fea46f4c5c20d0ee9ee073f18251. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BCM9B2301065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d14791865e19db49347f36c566259d748d868451a72bfef2c3e090bc8981d7. 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/BCM9B2301066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f78afaea9604937a7dc02140e6c830a5ba71f0730765206f5ff3407ab5673ac. 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/BCM9B2301067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cc2dc28a94ab3beae094f20403e9dd68f66873608aae5e625bf344ab66f900. 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/BCM9B2301068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dac18b1e39bc68b4198ca62d1018d5b905ad295ce89b4a27ea3050b0ef97d7. 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/BCM9B2301069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf092c8311fa61a3da952f82a0f7dc04f23fa5682a117a1e626d6ed000f7ee6e. 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/BCM9B2301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14330c9362492493fc797b921a17f8cb31e0c6d5f9fd647707bdac92e640016. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BCM9B2400993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b4e90af33b311898647305034d9adc3ef16c145bdb5fd81fca2d1016b4fbb8. 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/BRKTP2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cfb1d7773b6bc7ecdcb1199f8dfe4d53cf8b8d0207fcdc97c96f22dc386a53. 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/BCM9B2400780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eeec8324647945aab81c39dcf03b44f6f8c5623195b68f0e030205a08eeb33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCM9B2400549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763aa45786e435d65022cb147098a6f84d1ab7d9ecd4a0d6c8f3115866ea899e. 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/BCM9B2400489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cd47a545370d9d5f36a3f5bd4d4eee3dc124ced7988607c0bb0edd38e86b25. 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/BCM9B2400491.
Elas Tão Brigando x Divide e Compartilha
Os Menor da Favelinha X Bolando Um Beck do Bom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18238a10777ee6814032cf1d95ce641a74e0355c1d864bbb96c896895029843e. 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/QZTRX2581717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e84564bf00f5d41b4ba6ac175c8649df18784a0327ad67683f5c5cb828702b. 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/BCM9B2300767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788684d92465fd1ee6150ad438032ee848a6dd8a23c867bd925ab69422118ec4. 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/BCM9B2501595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031727454b0d1e7266ac6131735dd0c6057bfe55eb3cb04ccd5dbadc17d0638. 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/BCM9B2501578.