9Bach
type: MusicGroup
description: 9Bach is an alternative folk group formed by Welsh singer-songwriter and pianist Lisa Jên and guitarist Martin Hoyland, a veteran of 1990s alt-rock band Pusherman. The group now includes Dan Swain (ba
popularity: 15
followers: 4450
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additional property: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09307b462cc4695197f825529c1bacd800893bcc0ca2f72da9200e5b72253a8a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62f8fa53-6e1e-4c72-b148-2f4d2bef7448.json and https://artists.proofprofile.net/proofs/artist/62f8fa53-6e1e-4c72-b148-2f4d2bef7448.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:00:24Z
album: Yr Eneth Ga'dd ei Gwrthod
  type: MusicAlbum
  date published: 2008-05-26
album: C'weiriwch fy Ngwely
  type: MusicAlbum
  date published: 2008-10-13
album: 9bach
  type: MusicAlbum
  date published: 2009-06-29
album: Tinc - EP
  type: MusicAlbum
  date published: 2013
album: Tinc: EP
  type: MusicAlbum
  date published: 2013
album: The Mark Radcliffe Folk Sessions: 9bach (Live)
  type: MusicAlbum
  date published: 2014
  track: Babi'r Eirlys - Live
    type: MusicRecording
    duration: PT3M2S
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    explicit: false
    by artist: 9Bach
    in album: The Mark Radcliffe Folk Sessions: 9bach (Live)
      type: MusicAlbum
      date published: 2014
    isrc code: GB7VZ1400075
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      value: 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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c4cdfa400d0e88dcda12c90a8fb5aefc5ed0d94714e832464af8279ae47f67. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GB7VZ1400075.
      date published: 2026-07-20T16:58:47Z
    audio: Babi'r Eirlys - Live
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.008
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.616
      additional property: Energy
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      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.23
      additional property: Loudness (dB)
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        value: -13.914
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album: Lliwiau - Single
  type: MusicAlbum
  date published: 2014-03-23
album: Tincian
  type: MusicAlbum
  date published: 2014-05-09
album: Tincian
  type: MusicAlbum
  date published: 2014-05-11
album: Tincian
  type: MusicAlbum
  date published: 2014-05-13
album: The Mark Radcliffe Folk Sessions: 9bach
  type: MusicAlbum
  date published: 2014-08-10
album: Tinc
  type: MusicAlbum
  date published: 2014-11-17
album: Tincian
  type: MusicAlbum
  date published: 2015-05-01
  track: Lliwiau
    type: MusicRecording
    duration: PT3M46S
    duration ms: 226520
    explicit: false
    by artist: 9Bach
    in album: Tincian
      type: MusicAlbum
      date published: 2015-05-01
    isrc code: GBVEN1400269
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    additional property: OTSVerifyInstructions
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      value: 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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      date published: 2026-07-19T22:02:25Z
    audio: Lliwiau
      type: AudioObject
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      additional property: Time Signature
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      additional property: Instrumentalness
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      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
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album: Llyn Du
album: Anian
album: Ifan (Edit)
album: Llyn Du (Acoustic)
album: Yr Olaf (Acoustic)
album: Lliwiau (Acoustic)
album: Noeth
album: 9Bach
album: Cân Dai'r Cantwr
album: Pa Bryd y Deui Eto? (Live)
album: Yr Olaf (Live)
album: Cyfaddefa (Live)
album: Pontypridd (Live)
album: Ar y 9

Tempo (BPM)
type: PropertyValue
value: 119.847

Musical Key
type: PropertyValue
value: 5

Mode (Major/Minor)
type: PropertyValue
value: 0

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.543

Energy
type: PropertyValue
value: 0.497

Speechiness
type: PropertyValue
value: 0.038

Acousticness
type: PropertyValue
value: 0.031

Instrumentalness
type: PropertyValue
value: 0.001

Liveness
type: PropertyValue
value: 0.09

Valence (Positivity)
type: PropertyValue
value: 0.274

Loudness (dB)
type: PropertyValue
value: -9.511

Key Name
type: PropertyValue
value: F

Mode Name
type: PropertyValue
value: Minor

Tincian
type: MusicAlbum
date published: 2015-05-01

Llyn Du
type: MusicAlbum
date published: 2016-04-01

Anian
type: MusicAlbum
date published: 2016-04-29

Anian
type: MusicAlbum
date published: 2016-04-29

Anian
type: MusicAlbum
date published: 2016-05-13

Ifan (Edit)
type: MusicAlbum
date published: 2018-11-16

Ifan (Edit)
type: MusicAlbum
date published: 2018-11-16

Llyn Du (Acoustic)
type: MusicAlbum
date published: 2019-02-15

Llyn Du (Acoustic)
type: MusicAlbum
date published: 2019-02-15

Yr Olaf (Acoustic)
type: MusicAlbum
date published: 2019-03-08

Yr Olaf (Acoustic)
type: MusicAlbum
date published: 2019-03-08

Lliwiau (Acoustic)
type: MusicAlbum
date published: 2019-03-29

Noeth
type: MusicAlbum
date published: 2019-04-26

Noeth
type: MusicAlbum
date published: 2019-04-26

9Bach
type: MusicAlbum
date published: 2019-07-12

9Bach
type: MusicAlbum
date published: 2019-07-12

9Bach
type: MusicAlbum
date published: 2019-08-16

Cân Dai'r Cantwr
type: MusicAlbum
date published: 2019-08-16

9Bach
type: MusicAlbum
date published: 2019-08-16

Cân Dai'r Cantwr
type: MusicAlbum
date published: 2019-08-16

Pa Bryd y Deui Eto? (Live)
type: MusicAlbum
date published: 2020-01-17

Yr Olaf (Live)
type: MusicAlbum
date published: 2020-04-24

Cyfaddefa (Live)
type: MusicAlbum
date published: 2020-05-22

Pontypridd (Live)
type: MusicAlbum
date published: 2020-06-26

Ar y 9
type: MusicAlbum
date published: 2020-07-17