Bilbao or Bilbo is a city in northern Spain, the largest city in the province of Biscay and in the autonomous community of the Basque Country. With a population of 347,342 as of 2024, it is the 11th m
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 0x6ae46a2c0407ea04b473d5230e09f3c6c63cbde1387250b6a9b1bcc96c5425f6. 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/96a9ea54-8d55-417f-8123-a0d189392796.json and https://artists.proofprofile.net/proofs/artist/96a9ea54-8d55-417f-8123-a0d189392796.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 0x8c2d580c286004fae8f14872fcd03c52ea8d5fb3f1774c3cfaaabbda8d8178b2. 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/DEG442191066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32901f9693140bb1691e222f996b9becc1eadb6fdd4bcc888fb7ee7213408196. 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/DEG442191067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc67ac1391480e069498c0da232ff75148315ae896f839652c22c86a4ba4f52. 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/DEG442191068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc475f45d51e8ffc35315c47f6890268eb7963d018eb9e52a4840bf9f8c404135. 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/DEG442191021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7051e67cc9f42c7e8b7e6cb96f072b2782b3f3519a1a36d07eae3da24ebc8f67. 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/DEG442191065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479dbdd822e16654b208d5fe78edb1ca05f4f15e67e879043cafb53b16d4dfd4. 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/DEG442191069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb28802e947dc795b69f5ebb8ee818e012c83bc4f06986981be791e217abf55. 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/DEG442191070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ef3cfb05ee653a76c175bb44e5b023e1110464279ae0e9d0ef0f9628949cf8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEG442191071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b5f3eb94f1ae55a7d5ab87668dc6096570baf746572c43cedb29c57d0dac91. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DEG442191072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38d58d41abc02db03577999e61ae3e7f4d0d575e7bf03208356442cf9e5f4ac. 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/DEG442191073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c82bae9255c48a6bfafacf76bb1bc1295e5b4dcddd126d795164f53f47da56. 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/DEBL62400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17217c8f6576f93039f8360b3d3a03561bbfdd6deb670b7529d3bbf23864f359. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEBL62400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc621f54539f8c217bdf34bcf2a4d2546e24de5ad8e09e847d7da9f4e1550b7b0. 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/DEBL62400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e92d3f1b5a9d0d82644e8de631ef0fd7d614e43c88a30b5984d44e89c40fb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR96X2412579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723cc2a64f242a873eb3cb0978697a60be186d09f90732d2ba199e865338575f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2466370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e00e09e69d573d0a7246543a13032084aca78e7ff89b62c36cc32048c8d679c. 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/DGA0M2389076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1155d95293de13748728e878753c0db65b4050181269bdf7c7af871c1b9323f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEG442291181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc67ac1391480e069498c0da232ff75148315ae896f839652c22c86a4ba4f52. 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/DEG442191068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479dbdd822e16654b208d5fe78edb1ca05f4f15e67e879043cafb53b16d4dfd4. 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/DEG442191069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479dbdd822e16654b208d5fe78edb1ca05f4f15e67e879043cafb53b16d4dfd4. 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/DEG442191069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb28802e947dc795b69f5ebb8ee818e012c83bc4f06986981be791e217abf55. 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/DEG442191070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7051e67cc9f42c7e8b7e6cb96f072b2782b3f3519a1a36d07eae3da24ebc8f67. 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/DEG442191065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32901f9693140bb1691e222f996b9becc1eadb6fdd4bcc888fb7ee7213408196. 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/DEG442191067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc475f45d51e8ffc35315c47f6890268eb7963d018eb9e52a4840bf9f8c404135. 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/DEG442191021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6e33572075d97552f4ff1ab7b5658913085d2b02ae8c0bf103bf1ab8808f7e. 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/CH8092001461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d9ad9b812f8cba6d0a18e200c96684263026174750446a304cd0032e1128bc. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CH8092001463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98364d7eb84db1414ac1d640717ba7d9cd508a02872295ecf1b80e9838d9091. 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/CH8092001460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fc1449df95dc7646460c700a2c1375a4d8250fddb270ca7830473aa26b5a24. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH8092001462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266d55caaecb96eeac32bb8323145d5022461f835f7e9d492b3d493d1f4f1942. 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/CH8092001459.
Indie / Rock / Alt Compilation: July 2024 (Alexrainbirdmusic)