CTM is an initialism that may stand for: Companies and organizations Compagnie de Transports au Maroc, a Moroccan public bus transport company Companhia de Telecomunicações de Macau, a Macau teleco
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 0x4c105ab77c4315291e8a90b222ff725d78dcc1a912dfe511baa476bf335ab47c. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adc9e4b3-48fb-4af0-9441-e18a2c197e8f.json and https://artists.proofprofile.net/proofs/artist/adc9e4b3-48fb-4af0-9441-e18a2c197e8f.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 0x4df8a37df2feb73a28f5f087e92a869124a58f2594632898c95be316836653ec. 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/GBHLW1801191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5db11b34a2b9d6719fc53264d18eff48b92aca5159d4cea091f684b2f9f798f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBHLW1801192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1103c7d1fb33baac650b11e9716eba59b8d2a822e3e17113f73c69da4368ecc0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBHLW1801193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd436df1103c79150b4851bb9a9accff311e7e76a77698442f66b2ecf7b00d707. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBHLW1801194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3561d1d6ab1eae7235cc40f60f1f7227820926fc346496b51bef48e08aa08f. 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/GBHLW1801195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bad4d0f4f6c17e7a81643a6884908a3feab88310f7bd44c33a1ce6dc60c5cb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBHLW1801196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a15750cb28d7bb580feef8c83013936e969ed529fb6cb74c19ac205885f465. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBHLW1801197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4693a5a0a7ab10bf7ab16d1f4ee1d19fe02b6d140fd624313c575bf0564448a. 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/GBHLW1801198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e8a89eaa779a35521f27b4aac201aeb487b63219d80987c193546718e695a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBHLW1801199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e60b239449186128fe3893f66fb9585c4beb44b4cf8e0f3afea92ab20fcf5e5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBHLW1801200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc41f372d9de03cf9f3fa0d05637ee5237c8669e50ce237926eedd8c50a303b. 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/GBHLW1801201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa11cf347d8f6644e45e9bc9bb0c13609cfe2cc855c9ac56e4a68e7c57ac935. 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/GBHLW1903734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffa681789344ac7b9edc5bf40b82ddd5f62158febb9687ac81722272dffddc0. 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/DEL021470087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a38dc8b63504aac49dbe3bb029328d037c360de23e0c5f1feb0796b2445ce92. 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/DEL021470086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0ffbd22b807d1c6dddcbdf5da9c8b8b9cd439d59138d3cc8a5e7fd8c4b36a. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBHLW1901980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca53ae2f3a0c424b812f140e18e218cdda525baf08b06f72ab6ca5626d6420bf. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBHLW1901992.
I Am Here Now, When Will You Be Here Again?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4916690305c1ea9b105550696f6a4bb7f0bd9b0d4a10b8b0c32603e3869b3b. 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/GBHLW2302039.
Saul (Rosa Lux Hands on Fire Remix Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b460ddc307b5f97b71d151fd9040b8729774b8b57ecf8a401b4a9d76562b6a3. 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/DKRS41201714.
Harbour Boat Trips Vol. 02 Copenhagen by Trentemøller - the Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1103c7d1fb33baac650b11e9716eba59b8d2a822e3e17113f73c69da4368ecc0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBHLW1801193.