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 0x1c8d1f99b7e4bec1d53eb11221e9869940de35e1ffdb3445fc96fc133b13ae0a. 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/f6e99432-3b5f-4894-be17-b3507635558c.json and https://artists.proofprofile.net/proofs/artist/f6e99432-3b5f-4894-be17-b3507635558c.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 0x77df5c65fcf789d46e0d598d57d39ffffc8c8367b8ecaa74a10dd42803e72920. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US4R30725321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d29ee8309464282b4e39618dbd9b8b1b188928aaba5c91f09ce401d88058fa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US4R30725324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c6b99e491f179a930079389568a2fbaec661d90b8f7a814ce41bbf73a995bf. 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/US25T9918806.
Total Reggae: Greensleeves 40th (1977-2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9783f433958291ada84ca8414f73941a46aef1a14e3fda88e007ff36e4e852bc. 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/USVPR1700084.
Reggae Anthology : Classics, Collectors, Dubs & News
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f97177e65b6aaa3ce6f003cebce25ff79d63b3bfa5cc1c63d504b991e133b. 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/GBBZV8402499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bf224ef3f0548386b00d7c4a28abd77765019206e442b9c8b62cc78e2bbb7a. 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/USQY51071050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8941b42ef6f0836c417cc61d923857b2f92e5181245f00bcf3c815f723436ae. 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/USVPR0410191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452af943921ef8051779003d062f3c3331227958738decbc3bb3aa5cea93a1c3. 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/USVPR0410194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a69c2c6554f5febda1f46ec71d41806efc0b5ab5e1c3f1a9be860943fb16b99. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USMC10201202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0bc47739c329b1f4a77fd713ddfbaf4b9e1717b14d9aec03021b4436554669. 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/USVPR0308936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137efaf682710385f967947e11499587a77aa78457d5c9ac57d753e2d6d4ad05. 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/USVPR0308940.
Present The Taxi Gang - Hail Up The Taxi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5d57de8332655bab65f54f8d31b0a36d4c7b6525643a04d4e037146c1a9249. 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/GBAPJ9400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a072726d9cd180f6937dd11d63615eeb1c65bcd054359790e2bb8d70be0b74e. 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/USVPR1800285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f439d971c7331203c1788c58e5684557832d6192d800e8b8897aa60157df04. 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/USVPR0920010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a69c2c6554f5febda1f46ec71d41806efc0b5ab5e1c3f1a9be860943fb16b99. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USMC10201202.