Vertical Hold was an Australian musical group formed in Adelaide, South Australia. Active from 1980 to 1985, the band achieved regional success in South Australia with several radio hits and one natio
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 0x17d91aab55565aa21981b57c6fed9ba6f94bb8708d34982e700405acdb09e846. 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/bf570f67-2601-442d-9bf3-a49e576a717b.json and https://artists.proofprofile.net/proofs/artist/bf570f67-2601-442d-9bf3-a49e576a717b.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 0x1a39b9587bc64bfe4b51a1b4286226d8b886fbb22b03de9e509d70a1eb7bcadc. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:49Z), 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/USUM72304714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b394501f60a9cd8d0d0f5f00b2e7f17ae7cf9fc11267c8d4f0c8169604556f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUM72304773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf93bc7135a93d7096f99fc70033b1948612edc708a201fdabbf7f95a0261516. 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/USUM72304774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0190c5e867394dc1f730a30ccac0c1bedf2774da52e591fa370e3ee3988c2541. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USUM72304775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eb86b4790a575993676f114e8a40414d512e75932847c5cfd22724e6d29d5c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUM72304776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacc893a6ca326554fa3a750da9b93d891c774624cdc3e5b4ae96ae5616e70e7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:31:28Z), 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/USUM72304777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461aa539f3493eee8063caa9ade57efaa0fb4bf9a97b1c330af64907551e2b7e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USAM19500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6b699fdc3c70bd894b174387ded8cfa25c9acf02914fdd4e30f1ef144ced18. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USAM19500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6426a4ea10d48f0a9373d6dd6bb0654760ca8f3c55d376cb9df1a7eb91f0e539. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USAM19500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab5342f99328283025b3cd8475b423afcd74a4b31f198b2cb4353148c7b3605. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USAM19500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402c47ea1ed66dd0de3a4f4956af22be3639be2e97fc00ffd1fc9d63a8644de. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USAM19500579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e71e4213df2d249e7df49c6490c17f50502833235b167277b4a6dbe320ebbe1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USAM19500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f15702ffb07a5ad6a56904c0692b1d4e7fd60974acd27fd148a530237f7c510. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USAM19500582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99740d22ddc42e20684f328f4b20ce8948d1ba7949022c13461fb81d65d6b319. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USAM19500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b088c0e8f9032d3b3f90abf18a8fdd0c72a680fee4c7873e49ed4e197eb219. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USAM19500585.