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 0x2ce1fb0dde6fcb8b5fef610576c75d9deaec631ae3c77493245b3e3800b545e9. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa43072c-6d2a-4a47-ae69-71edf488badf.json and https://artists.proofprofile.net/proofs/artist/fa43072c-6d2a-4a47-ae69-71edf488badf.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 0x04e762df5cdec03cd141a83a6c342da52c623dbdba88b7333f0dae5783e42e6e. 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/CH0139600235.
Dr Schacher Seppli, Sieges-Hymne featuring Ruedi Rymann
Zur Erinnerung an einen grossartigen Jodler und Menschen (Mit 47 der schönsten Lieder)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e07304198bb44e521e13be4dccde20636762d7ef6cffe532d7fe4afb1c963. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH0130200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac29eb837dc4b34aed66b97b5a196b583ee91e08ccf5139a317c2aa085f567. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH0110700181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e762df5cdec03cd141a83a6c342da52c623dbdba88b7333f0dae5783e42e6e. 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/CH0139600235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e025969741054125800da9dc7a2e7169ce73e004b34019949ac28c68b18be3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CH0130200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbf0f6c59f648acdc5f35e7d868439e4ddd7d4e5487699bc79563c1d9e4f53b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/CH0130200277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc447af9212278a053d393b5e4c271efd34ac38c73302fadc03fc3008ac77027. 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/CH0139600236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c0737f29b9b3150913c3bf01d406669c05d1ad4253cefd9e0b2bf8eb8f31b9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CH0130000312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba71ab17f833b29199c4f1e051c8fe24e03800d854274e9dbc4f0b9329003b2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CH0130200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc7fffa7e57cfad69b5adde21e422456eb930cadd38836602471e68e79cfddd. 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/CH0139600252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7489b93688a436138bfdfe153696ec28dbdb8f143b53e2b149ba47203eb3f18f. 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/CH0130200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5130881b68e021ad5b130b7396b99e2d65282255ff511088cc91d9c576a22698. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH0130100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbc17ccc1e288ee86bc5781c54da489d040237cbded495a93b82e3465d82e75. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH8381310085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44eeb2f2af28ebfa0431ba7af9d1ade457b116e8cf817dacf07f87915b04ffc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH0139600243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256e9431a4de462f8dbbdd87ca79bcd35531a7b3821f6bbe15f46011bb679e4c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH0139600251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5f57c2fab75210b8a9f0d0c0fb9b91291947703ed6354f45d1b324f77b7181. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH0139800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60332bec023578e273b3efa3d455cd02333d6b4f2fccf218fcd7804180b45e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH0130000308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc417e9a46f9acae43aad7fba5dde3b048fc0f2ef2c4c8b5f9a7a4089ab6d96b. 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/CH0139600238.