Soundwalk Collective is an international experimental sound art collective founded in 2001 by Stephan Crasneanscki, who was joined by Simone Merli in 2008. The group is based in Berlin and New York. T
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183a94721babfb9ad7a4d460ccffe55475925d97d6a50d72d7acb5269ba28740. 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/f18366ef-0cea-4bf2-a64a-12c6c334ffbe.json and https://artists.proofprofile.net/proofs/artist/f18366ef-0cea-4bf2-a64a-12c6c334ffbe.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31227c8e60cb07e3974bfe95f87b9f6138febd85410085ecc0b5c9959242f0e0. 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/GBBRP2401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ded7647fa336b3608bb5ec54e2833a01792cd845d4fcc59a5645eaeec75c30. 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/GBBRP2200794.
Song Of The Highest Tower - Kaitlyn Aurelia-Smith Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7ea5ebeeccce2b7584426f98441622ecbf489b92cc00ed517d508c1da8a33a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBBRP2200795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95471c5302c97950b57f2202d4f8f63568c83b3b7e652d848675a0f15eae1e8b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBRP2200796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d418d4fc50883a287959c898f80e9b4ee5eb0ed6778ada2228cb9cb4985e89. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:49:43Z), 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/GBBRP2200798.
Song Of The Highest Tower - Atom TM Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63318ca6d896109f67721552679c76f4de55db46f2c85b54230e1e9456c21d56. 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/GBBRP2200799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990cc0d52d1bc918c77cb677ec58afb6cc5a6bbcacdb6ca1f7219e7b26fb8575. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBBRP2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9103b2892656376a0716249be8f0cd3589c439144675abc04f357cf6f00be47. 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/GBBRP2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ae01d862ef8c3cc940f473120ca871dea8d7a89b248c6a56f73fb18017e39c. 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/GBBRP2000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3edda19eab991f5695d8262dd37aa3a2dc6238b9dd58c588f1015bb5e0b0a7. 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/GBBRP2000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71dbaff1086ed63916e486619d1fdc85a8498cd5ddee2fbbdbf79c64c0e3e5a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBBRP2000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b884c9bdb46104dde041c07512d2443c1089e12a4d571a21b22662edaaf9bb. 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/GBBRP1995801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6511bdbe04e4500de2a54d450fd17d54fe87bc31bb53dbcd40259be46bc75308. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBBRP1995802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427bc4946a952c358123cfe1d0a2ddd05316785a960613522857b0087d5b30d4. 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/GBBRP1995803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a2609c2f2b4f04b3ade7ee766bd9d8c3591b653cb874f088808430a9004792. 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/GBBRP2200797.
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 0x781f78d9b2cc1909c5492c6f984aa933816596269c806ba5ee21a194397788e2. 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/GBBRP2200800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129054cae148a5d148e376d1d978693aa5ec85462ab31e8313689fe19b3ef59f. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBBRP2000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4789273089265e2047c937ae6108dc708970a6f0c60b2c2f52b689d429764b2e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBBRP2000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f6fd56b21525b7cf9c159b0cff68a6c84d8a590e354102148054d7b99a93d5. 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/GBBRP2000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1c3b21f7904fece426d4c97ec960847befb8718a844991ce3008baa7886028. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBBRP2000118.