A soundscape is the acoustic environment as perceived by humans, in context. The term, originally coined by Michael Southworth, was popularized by R. Murray Schafer. There is a varied history of the u
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 0x42326640f2f41793f610848db26af10c8197d8bc2ccf37ac00c5d28b0c6e4a76. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c81fccc2-1ddf-4cf0-973b-71d96f29028f.json and https://artists.proofprofile.net/proofs/artist/c81fccc2-1ddf-4cf0-973b-71d96f29028f.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 0x0973c1450d8c585fb7be5dfed2adc250c3887dfa23e1eeebe0d60016e3ff1273. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SE7TY2501293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6adaa8bad3650060248769d47057af1b3edd23e01e9206e6787f33603ac333b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE7TY2501309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72532d0a81c375b5d38114c76c3e66a876aecb23fbeffba36f955f17dc646e15. 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/SE7TY2501317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c7321932ae506a5d7010730510b53f4941d0eee4796fb0776d1258252a57ed. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/SE7TY2501321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3782faf0234f1eebd386d0ea9ff6f370915db77b788bf3c39030a788190bb8ff. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SE7TY2501325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aec6c99fbcd00c7db8ff4a34e43a4f24c62081c3efeb4f2fa7ccf3d1b67e303. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SE7TY2501329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdc1aeb2c686c1b9ad55c995830dd6815e064e7ec1845c0a457252032c5b0ee. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/SE7TY2501353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e0bbe018f2b7595e560f77d1194f66ec0891471d3ae29172d5fac0cc5dafd8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE7TY2501357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe6d427586a1085ff5d3ad62ca35f78ad8d9f732a68c7f5b5db721d78075774. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/SE7TY2501361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda791a461a6a99da5550e1e9df2894fb6f83e91fbff27b73773725aaf7648d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE7TY2500757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbf01e01e4289f9f42bb3670720d4813a4d7a38db69e714705aec2923004208. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE7TY2500761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b7d7ba817b9f2de17c8fcff410fea88a982b7a00e9d1529f048e4fafc38e62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa8656b13a281f88ddf6d05a2cfa8de17bd3fdd3c8ec086157ece476fec8762. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb657f557438536da601859d31b06a52bce89b3cdf629a9ac6a6e1ea3c2e9cfa. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE7TY2500781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38c93cd14ec6d9c2856cc551bd902481af8d0bac117abdfe5dac2458b3ddd01. 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/SE7TY2500785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd166b4bb680f4b350ee4151a32d91cdb5a47ab3584d0b533ffe811b5eb2f2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE7TY2500789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba51f1cb8b3c89e23b11bb5dd6333f7afbfeae98bbef234054c967255a5373. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SE7TY2500801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fac6801667fe5b051e79d988347d8c5112fc547ec24434fb181367be170a3c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE7TY2500805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1043c83d208c12b6ce8a723a91ff2be73b599fcaec182e02a61c5e20bade7f1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE7TY2500809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4615cd38b09a5887c632b5dc84832f5545090644c4e7322a44a596d495e83e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE7TY2500813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf407bc41850e72f717af940f438237b39570bcf659a11fa523a635a5a95e922d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee06f9e904c7191bedbc4790790459742017d29c6118d9c24f914064dd5d3aca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f60da72b0fc831e3caf172b0bc5a1431a2abbb6de0100ef41733bf84464d69a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE7TY2500829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f3eb0bee567107ade6de1c6be7b774fdd4971c91998e40840af2c86da776b. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/SE7TY2500833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce485125def1e27497686f2f60a59f937776375f75cd617db52e62c55b3d7918. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f374809ea2a0b784a691bf6546a380d357fdb6c0120b93351e822a0e381f0a. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/SE7TY2500849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58679ddf2cc63b64914ecd73b01935f049eec42ea61a8b4c791f34cd02661a4. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE7TY2500853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b1c06346c5a99c9a72ed7677709f27fe5da9f03a7525f3b57e4ef11a8c791a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE7TY2500861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf028fde7aac5bf8759c67121b74f3916d8c99f17625be3432ca5dd8b227e0ad2. 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/SE7TY2500869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fe38b7f2eecf99f25035505b7e6250c779161181cef746a2fc930f28034b10. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/SE7TY2500881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2f7d7edde658d48939bb4e018a3f2b7be4afeea6044dc08882cd9b48dfe4e1. 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/SE7TY2500885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf82bdb84406ba37bf18db145717976b10f672738a3e427c0f43212e8d8814eb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f3f08aa4522ff57b19e04e526717aedbef1cbc07cc73b1b54842a183efdfc8. 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/SE7TY2500905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c0ac6a2ad7f9acc92ecbffb284f31362963557b6ae51c8222e7d7b8cf5f576. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/SE7TY2500913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fff1b8cab62d60271ecbaa17c03cd83b7eaaaa877679ed9328e5bc71e3c020. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edb04f004fcf26cc8ee7efb71961e4c669c1cb6e3cf60b2a6b4454c001de1e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE7TY2500921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793f290cab8ae3f3839b0d8cb5ff607cecc96b11a05380e92f1e550be003b828. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE7TY2500925.