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 0x21cdc46cc856204fc20cfc453b35198520ad45afaa29dc90428cfe8938d6ddec. 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/869d2ae5-2c51-4920-8abd-1abde0b18206.json and https://artists.proofprofile.net/proofs/artist/869d2ae5-2c51-4920-8abd-1abde0b18206.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 0xe586bbfbcd0d7fc73f96a05d6acce6dbd0dc0e596328a3bd58be91829ddeafb1. 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/GB6ZW2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecf91d3424b5e906a54d865484ce44d01829771dea15669c5905b2451f2f3ce. 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/GB6ZW2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36db08c46748dc1ac06c666acb1809730a051069b808f149cc6702838f280cc. 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/GB6ZW2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71965b1852312c524f4647f7ada2a85b864829aee2b38b82e41b2eef9eead5b7. 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/GB6ZW2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b42d1aff46f3f79ca1f99c12f29e2c9f4581714eea12ed26287bdb7b11d67a. 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/GBVW22200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc202282045a7d24fc99b5783f1b009a6d2c5d3d9d700eee32f852de58df95b. 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/GBVW22200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e634c843909df74e62cfa148c9ea58a1ac60045608e080ef1cfcf97ee3bba54. 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/GBVW22200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52021c7bc3611798ac381137cf93af811fb4672c59e2a8456f0f78b3c16b8b5. 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/GB6ZW2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24884eed4de087a46fc6afbb37c76a5cf448da52cec442883656b61e6733443. 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/GB6ZW2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54210be3c386a79b808346f5a909b14a5fe5ed27aa099c445e2d1a6fbfa43daa. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GB6ZW2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab20bc31e1719cb29c976717949b858e195c2bc7b942bc95f5734f1765b54112. 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/GB6ZW2100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5576d06badfefa04410cff67ddce630610e226c34404aecfe669cc04d886a0. 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/GB6ZW2000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe75303010bfb471eddbed532325c0a6757ff9d1c3f0a0669fc9d0197db9e77. 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/GB6ZW2000153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c433b68706acdf1619c493998086b77dc3397744f455948b48b4058cf93c4ae. 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/GB6ZW2000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dc260c457d3c30ef76d8bf0782656ea51a5ffa7e515ab6654e22badcb8d617. 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/FR59R2049788.
Brothers of the Stone: Return to Stoney Island
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1be42cd6e14da693f8431fbc79cbb0b0cb902e5358bee8b24dfe79b482f0a45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB6ZW1800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8236811753664b3ab5a9517ce7e42e66938a061b21f042644f2357065c88cd. 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/GB6ZW1800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2bc06d3f4631a54914f3419ed59935ef2e1f15062ee46e65de7e319fbf8198. 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/GB6ZW1600747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4bb2453fe7f6b2cc4dfd28513fe77b3a286d11b2909582794b10a7771c709c. 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/GB6ZW1600748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4105c075cb33209826f2701fa0c90ebd5cc368128b8689369db8e42d760df8. 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/GB6ZW1600749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231b79d875b29eb6d5a50ffa15cf9bb3b426ea65650dc5d9428e27a46f958993. 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/GB6ZW1600753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e9ed35bbaecdab140ebd44510510dfaa31df243481e9b7d0e48b0740d7ad35. 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/GB6ZW1600755.
Where's the Bud (feat. Eric the Red, Leaf Dog & DJ Riseone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f25cfad00d6f8a99de4ea710e6a2f7fbfda34e5ea4d94f5123e8416269fde. 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/GBVW21500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa777f775dc356d173a111a529901c0e97cbc577612fc1b5ed2615a9c817926bc. 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/GBGZW1300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3deecffe3a7f076d05db5690010c379c839c958f4b454d50f68b80aec14db7. 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/GBGZW1300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7552c077780ecd5427e65e4cc2e1feb71dbb1dea54b0e15fedccad06f45c88e1. 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/GBGZW1300260.