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 0x694be85847a6b83095f441bcf16a6592f7a30ec79ef48ba3e6f144f0cfcfce75. 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/cc294e33-aa99-406c-9234-57b7fe9f6095.json and https://artists.proofprofile.net/proofs/artist/cc294e33-aa99-406c-9234-57b7fe9f6095.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 0xb71f587688f1e77106b246603527de009613903b9809be9e2772d24367114760. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKHYR2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321d8b8df8709bcb10420bb4702d01ea31fdb44bacc0db2774612b22d2383806. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKHYR2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd056175787d6b71188a705c2f191043da2eb911eb957f7e2441866357f69ad59. 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/BKHYR2500244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a56de763d9f86a215ae5891071260c140016b5fb0dfbef2c377c10d2ce9994. 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/BKTKU2500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb728157439802576ff23262a3681c3da2717be93c40b6cd3fc4effc0f5a416d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BCM9B2500625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1314627280cace9fc2fe775c1e5a69b79cd6045812497a767174c479f93dc73c. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BKR2K2500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd6ebcc41ede508756518821cef06459980cce7e6035b6c735e927ff3ee6127. 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/BKR2K2500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41d40171a3b4b024ca94635a92d1e49f8818a6009272cd0e7ddf29a6c313bca. 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/BKHYR2500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44f4abaf78d4924a75f9e221dd7d21f8da079b03e7fed4ecb1df7249a8eae45. 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/BKHYR2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b24e0387b8245905de7fa30518f5332e8770943444977c11fbea4362745b84. 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/BKHYR2400456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0520b964bae75c80671306e5a61178316f208f5850a4b215f8380f96909120b. 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/BKHYR2400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b65300e76172edbded532394863e3e7e6dbe4c069f19dea3b49736bacf9ba0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTVM2414599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd650edd5f94f6759cdeafa68a4352467a7bbc007835bbc787c99f9cacd317f3f. 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/BXG6R2100942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93812dbdea92d73a57015d6a4af1d107424221675a7c70bf329d19a7003ee92. 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/BKHYR2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2975ba45d16221a8e368aabfb935a9a7f3e79906f12ea75596c90956a4cda911. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC3PG2303613.
Atabaque do Doze (feat. MC Nego da Marcone, Mc Lustosa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20c12789831954aa6b8b5d7caed5407b1d484452d824825cf27973476dfb4c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCAPW2300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ed9da4678d3d59141fcb459129a3e24569c27677158bad142329be1328ac2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BCFCV2400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd465955644cfa66b31e294cc2f58d060bb6cc10b1a73841aaa72843cfe247f84. 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/QM3DF2166363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76256415272738f58519f5b52152814ba87d89111c1aea0dfdc3d28f6828d03a. 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/BKHYR2400138.
Vira a Cara Pra Parede (feat. MC Nego da Marcone & DJ Higoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062c34ea548f5246603123a7fc8ab75340a5cd576207e3053eef52d2b825a68d. 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/BCJT12200028.